| **Restructuring (Details) (USD $)**                         | 3 Months Ended | 6 Months Ended |
|-------------------------------------------------------------|----------------|----------------|
||
| **Restructuring [Abstract]**                                |           |           |   |   |
| Restructuring accrual of severance and related benefits     | $ 1,900,000    |           |   | $ 1,300,000 |
| Restructuring Charges Amount Payable In Common Stock Value  | 1,200,000      |           |   |   |
| Restructuring Charges Amount Payable In Common Stock Shares | 412,000        |           |   |   |
| **Activity in restructuring accrual [Roll Forward]**        |           |           |   |   |
| Balance at beginning of period                              | 22,000         | 130,000        | 731,000 |   |
| Additions, net                                              | 1,886,000      | 62,000         | 125,000 |   |
| Payments                                                    | (22,000)       | (170,000)      | (726,000) |   |
| Balance at end of period                                    | 1,886,000      | 22,000         | 130,000 | 731,000 |
| Severance and Related Benefits [Member]                     |           |           |   |   |
| **Activity in restructuring accrual [Roll Forward]**        |           |           |   |   |
| Balance at beginning of period                              | 22,000         | 115,000        | 571,000 |   |
| Additions, net                                              | 1,886,000      | 0              | 0 |   |
| Payments                                                    | (22,000)       | (93,000)       | (456,000) |   |
| Balance at end of period                                    | 1,886,000      | 22,000         | 115,000 |   |
| Other Exit Costs [Member]                                   |           |           |   |   |
| **Activity in restructuring accrual [Roll Forward]**        |           |           |   |   |
| Balance at beginning of period                              | 0              | 5,000          | 6,000 |   |
| Additions, net                                              | 0              | 62,000         | 122,000 |   |
| Payments                                                    | 0              | (67,000)       | (123,000) |   |
| Balance at end of period                                    | 0              | 0              | 5,000 |   |
| Contract Termination Costs [Member]                         |           |           |   |   |
| **Activity in restructuring accrual [Roll Forward]**        |           |           |   |   |
| Balance at beginning of period                              | 0              | 10,000         | 154,000 |   |
| Additions, net                                              | 0              | 0              | 3,000 |   |
| Payments                                                    | 0              | (10,000)       | (147,000) |   |
| Balance at end of period                                    | $ 0            | $ 0            | $ 10,000 |   |

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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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+ References
No definition available.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.
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| - Definition
The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.
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