| **Share-Based Payment Arrangements (Details) (USD $)Share data in Thousands, except Per Share data, unless otherwise specified** | 12 Months Ended           |
|----------------------------------------------------------------------------------------------------------------------------------|---------------------------|
||
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                               |                      |   |   |
| Number of stock incentive plans                                                                                                  | 2                         |   |   |
| Number of employee stock purchase plans                                                                                          | 2                         |   |   |
| **Options, Outstanding [Roll Forward]**                                                                                          |                      |   |   |
| Outstanding, Beginning balance (in shares)                                                                                       | 5,366                     |   |   |
| Granted (in shares)                                                                                                              | 1,018                     |   |   |
| Exercised (in shares)                                                                                                            | (14)                      |   |   |
| Forfeited                                                                                                                        | (608)                     |   |   |
| Expired                                                                                                                          | (463)                     |   |   |
| Outstanding, Ending balance (in shares)                                                                                          | 5,299                     | 5,366 |   |
| Exercisable (in shares)                                                                                                          | 3,875                     |   |   |
| **Weighted Average Exercise Price [Roll Forward]**                                                                               |                      |   |   |
| Outstanding, Beginning balance (in dollars per share)                                                                            | $ 12.27                   |   |   |
| Granted (in dollars per share)                                                                                                   | $ 5.13                    |   |   |
| Exercised (in dollars per share)                                                                                                 | $ 5.08                    |   |   |
| Forfeited (in dollars per share)                                                                                                 | $ 10.63                   |   |   |
| Expired (in dollars per share)                                                                                                   | $ 14.70                   |   |   |
| Outstanding, Ending balance (in dollars per share)                                                                               | $ 10.89                   | $ 12.27 |   |
| Exercisable (in dollars per share)                                                                                               | $ 12.45                   |   |   |
| **Weighted Average Remaining Contractual Term [Abstract]**                                                                       |                      |   |   |
| Options Outstanding                                                                                                              | 5 years 9 months 25 days  |   |   |
| Options Exercisable                                                                                                              | 4 years 10 months 10 days |   |   |
| **Aggregate Intrinsic Value [Abstract]**                                                                                         |                      |   |   |
| Options Outstanding                                                                                                              | $ 304,000                 |   |   |
| Options Exercisable                                                                                                              | 118,000                   |   |   |
| Total compensation expense recognized                                                                                            | 3,546,000                 | 6,536,000 | 6,362,000 |
| **Employee stock purchase plan [Abstract]**                                                                                      |                      |   |   |
| Cash received from exercises under all share-based payment arrangements                                                          | 100,000                   |   |   |
| Employees [Member]                                                                                                               |                      |   |   |
| **Assumptions used in computing the fair value [Abstract]**                                                                      |                      |   |   |
| Expected term                                                                                                                    | 5 years 4 months 24 days  | 5 years 3 months 18 days | 5 years 3 months 18 days |
| Former CEO [Member]                                                                                                              |                      |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                               |                      |   |   |
| Vesting period                                                                                                                   | 9 years 11 months         |   |   |
| **Assumptions used in computing the fair value [Abstract]**                                                                      |                      |   |   |
| Expected term                                                                                                                    |                      |   | 8 years |
| **Aggregate Intrinsic Value [Abstract]**                                                                                         |                      |   |   |
| Estimated requisite service periods                                                                                              | 9 years 11 months         |   |   |
| Non Employees [Member]                                                                                                           |                      |   |   |
| **Assumptions used in computing the fair value [Abstract]**                                                                      |                      |   |   |
| Expected term                                                                                                                    | 10 years                  |   |   |
| Directors and Officers [Member]                                                                                                  |                      |   |   |
| **Assumptions used in computing the fair value [Abstract]**                                                                      |                      |   |   |
| Expected term                                                                                                                    | 7 years 4 months 24 days  | 7 years 4 months 24 days | 7 years 3 months 18 days |
| Options [Member]                                                                                                                 |                      |   |   |
| **Assumptions used in computing the fair value [Abstract]**                                                                      |                      |   |   |
| Expected volatility, minimum (in hundredths)                                                                                     | 73.00%                    | 70.00% | 68.00% |
| Expected volatility, maximum (in hundredths                                                                                      | 90.00%                    | 85.00% | 78.00% |
| Expected dividends (in hundredths)                                                                                               | 0.00%                     | 0.00% | 0.00% |
| Weighted average expected term (years)                                                                                           | 5 years 11 months 16 days | 6 years 1 month 10 days | 6 years 2 months 1 day |
| Risk-free rate, minimum (in hundredths)                                                                                          | 0.76%                     | 0.57% | 0.77% |
| Risk-free rate, maximum (in hundredths)                                                                                          | 2.83%                     | 1.71% | 2.97% |
| **Employee stock purchase plan [Abstract]**                                                                                      |                      |   |   |
| Total unrecognized compensation                                                                                                  | 4,400,000                 |   |   |
| Weighted average periods                                                                                                         | 2 years 1 month 6 days    |   |   |
| Options [Member] | Minimum [Member]                                                                                              |                      |   |   |
| **Assumptions used in computing the fair value [Abstract]**                                                                      |                      |   |   |
| Expected term                                                                                                                    | 5 years 3 months 18 days  | 5 years 3 months 18 days | 5 years 3 months 18 days |
| Options [Member] | Maximum [Member]                                                                                              |                      |   |   |
| **Assumptions used in computing the fair value [Abstract]**                                                                      |                      |   |   |
| Expected term                                                                                                                    | 10 years                  | 10 years | 10 years |
| Restricted stock [Member]                                                                                                        |                      |   |   |
| **Restricted Stock [Roll Forward]**                                                                                              |                      |   |   |
| Nonvested, Beginning balance (in shares)                                                                                         | 28                        |   |   |
| Granted (in shares)                                                                                                              | 0                         |   |   |
| Vested (in shares)                                                                                                               | (27)                      |   |   |
| Forfeited (in shares)                                                                                                            | (1)                       |   |   |
| Nonvested, Ending balance (in shares)                                                                                            | 0                         |   | 98 |
| **Restricted Stock, Weighted Average Grant-Date Fair Value [Roll Forward]**                                                      |                      |   |   |
| Nonvested, Beginning balance (in dollars per share)                                                                              | $ 5.35                    |   |   |
| Granted (in dollars per share)                                                                                                   | $ 0                       |   |   |
| Vested (in dollars per share)                                                                                                    | $ 5.35                    |   |   |
| Forfeited (in dollars per share)                                                                                                 | $ 5.35                    |   |   |
| Nonvested, Ending balance (in dollars per share)                                                                                 | $ 0                       |   |   |
| Performance-based options [Member]                                                                                               |                      |   |   |
| **Aggregate Intrinsic Value [Abstract]**                                                                                         |                      |   |   |
| Total compensation expense recognized                                                                                            | 100,000                   | 2,000,000 | 400,000 |
| 2006 Award [Member] | Options [Member]                                                                                           |                      |   |   |
| **Aggregate Intrinsic Value [Abstract]**                                                                                         |                      |   |   |
| Estimated requisite service periods                                                                                              | 2 years 6 months          |   |   |
| 2011 Award [Member] | Options [Member]                                                                                           |                      |   |   |
| **Aggregate Intrinsic Value [Abstract]**                                                                                         |                      |   |   |
| Estimated requisite service periods                                                                                              | 1 year                    |   |   |
| 2012 Award [Member] | Options [Member]                                                                                           |                      |   |   |
| **Aggregate Intrinsic Value [Abstract]**                                                                                         |                      |   |   |
| Estimated requisite service periods                                                                                              | 1 year                    |   |   |
| 1996 Plan and 2005 Plan [Member] | Options [Member]                                                                              |                      |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                               |                      |   |   |
| Expiration term                                                                                                                  | 10 years                  |   |   |
| **Aggregate Intrinsic Value [Abstract]**                                                                                         |                      |   |   |
| Weighted average grant-date fair value of options granted (in dollars per share)                                                 | $ 3.74                    | $ 6.38 | $ 5.51 |
| Total Intrinsic Value of options exercised                                                                                       | $ 11,000                  | $ 174,000 | $ 345,000 |
| 1996 Plan and 2005 Plan [Member] | Options [Member] | Minimum [Member]                                                           |                      |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                               |                      |   |   |
| Vesting period                                                                                                                   | 3 years                   |   |   |
| 1996 Plan and 2005 Plan [Member] | Options [Member] | Maximum [Member]                                                           |                      |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                               |                      |   |   |
| Vesting period                                                                                                                   | 5 years                   |   |   |
| 1996 Plan and 2005 Plan [Member] | Restricted stock [Member] | Minimum [Member]                                                  |                      |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                               |                      |   |   |
| Vesting period                                                                                                                   | 3 years                   |   |   |
| 1996 Plan and 2005 Plan [Member] | Restricted stock [Member] | Maximum [Member]                                                  |                      |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                               |                      |   |   |
| Vesting period                                                                                                                   | 5 years                   |   |   |
| 1996 Amended Stock Incentive Plan [Member]                                                                                       |                      |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                               |                      |   |   |
| Common stock reserved for issuance of awards (in shares)                                                                         | 5,000                     |   |   |
| 2005 Stock Incentive Plan [Member]                                                                                               |                      |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                               |                      |   |   |
| Common stock reserved for issuance of awards (in shares)                                                                         | 8,450                     |   |   |
| Employee Stock Purchase Plan [Member]                                                                                            |                      |   |   |
| **Assumptions used in computing the fair value [Abstract]**                                                                      |                      |   |   |
| Expected volatility, minimum (in hundredths)                                                                                     |                      |   | 43.00% |
| Expected volatility, maximum (in hundredths                                                                                      |                      |   | 51.00% |
| Expected dividends (in hundredths)                                                                                               |                      |   | 0.00% |
| Expected term                                                                                                                    |                      |   | 6 months |
| Risk-free rate, minimum (in hundredths)                                                                                          |                      |   | 0.06% |
| Risk-free rate, maximum (in hundredths)                                                                                          |                      |   | 0.22% |
| Employee Stock Purchase Plan [Member] | Options [Member]                                                                         |                      |   |   |
| **Assumptions used in computing the fair value [Abstract]**                                                                      |                      |   |   |
| Expected term                                                                                                                    |                      |   | 6 months |
| **Restricted Stock, Weighted Average Grant-Date Fair Value [Roll Forward]**                                                      |                      |   |   |
| Percentage of quarterly compensation, grant to all employees (in hundredths)                                                     |                      |   | 25.00% |
| Discounted price as percentage of the fair market value (in hundredths)                                                          |                      |   | 85.00% |
| Qualified Employee Stock Purchase Plan 1998 [Member]                                                                             |                      |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                               |                      |   |   |
| Common stock reserved for issuance of awards (in shares)                                                                         | 4,400                     |   |   |
| **Employee stock purchase plan [Abstract]**                                                                                      |                      |   |   |
| Shares Purchased (in shares)                                                                                                     |                      |   | 428 |
| Weighted Average Grant-date Fair value (in dollars per share)                                                                    |                      |   | $ 0.88 |
| Qualified Employee Stock Purchase Plan 1998 [Member] | Minimum [Member]                                                          |                      |   |   |
| **Employee stock purchase plan [Abstract]**                                                                                      |                      |   |   |
| Price Range (in dollars per share)                                                                                               |                      |   | $ 4.62 |
| Qualified Employee Stock Purchase Plan 1998 [Member] | Maximum [Member]                                                          |                      |   |   |
| **Employee stock purchase plan [Abstract]**                                                                                      |                      |   |   |
| Price Range (in dollars per share)                                                                                               |                      |   | $ 5.65 |
| Qualified Employee Stock Purchase Plan 1998 [Member] | Options [Member]                                                          |                      |   |   |
| **Restricted Stock, Weighted Average Grant-Date Fair Value [Roll Forward]**                                                      |                      |   |   |
| Maximum percentage of common stock ownership to be eligible for employee stock purchase plans (in hundredths)                    |                      |   | 5.00% |
| Non-Qualified Employee Purchase Plan 1998 [Member]                                                                               |                      |   |   |
| **Share-based Compensation Arrangement by Share-based Payment Award [Line Items]**                                               |                      |   |   |
| Common stock reserved for issuance of awards (in shares)                                                                         | 1,100                     |   |   |
| **Employee stock purchase plan [Abstract]**                                                                                      |                      |   |   |
| Shares Purchased (in shares)                                                                                                     |                      |   | 162 |
| Weighted Average Grant-date Fair value (in dollars per share)                                                                    |                      |   | $ 0.84 |
| Non-Qualified Employee Purchase Plan 1998 [Member] | Minimum [Member]                                                            |                      |   |   |
| **Employee stock purchase plan [Abstract]**                                                                                      |                      |   |   |
| Price Range (in dollars per share)                                                                                               |                      |   | $ 4.62 |
| Non-Qualified Employee Purchase Plan 1998 [Member] | Maximum [Member]                                                            |                      |   |   |
| **Employee stock purchase plan [Abstract]**                                                                                      |                      |   |   |
| Price Range (in dollars per share)                                                                                               |                      |   | $ 5.65 |

| X                                                                                                                                                                                                                                                                                                                                                                             |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Represents the maximum percentage of common stock ownership to be eligible for employee stock purchase plans.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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Represents the number of employee stock purchase plans of the Company.
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| X                                                                                                                                                                                                                                                                                                             |
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| - Definition
Period of expiration of share-based payment award.
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| - Definition
Weighted Average Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Represents the number of stock incentive plans of the Company.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                |
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| - Definition
The weighted average grant date fair value for shares purchased on the open market for issuance to employees under the plan.
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No definition available.
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                 |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Discounted price per share as percentage of the fair market value on the date of exercise, for grant to all employees of options to purchase shares of common stock.
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No definition available.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The per share price paid for shares purchased on the open market for issuance to employees under the plan.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
+ References
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| - Definition
Unrecognized cost of unvested options awarded to employees as compensation.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.
+ References
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| X                                                                                                                                                                                                                                                  |
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.
+ References
No definition available.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.
+ References
No definition available.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.
+ References
No definition available.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.
+ References
No definition available.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Gross number of share options (or share units) granted during the period.
+ References
No definition available.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of options outstanding, including both vested and non-vested options.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The number of shares purchased on the open market during the period for issuance to employees under the plan.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average price at which option holders acquired shares when converting their stock options into shares.
+ References
No definition available.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.
+ References
No definition available.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.
+ References
No definition available.
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.
+ References
No definition available.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of share options (or share units) exercised during the current period.
+ References
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