| **CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) (USD $)In Thousands, except Share data**       | Common Stock | Additional Paid-In Capital | Accumulated Deficit | Accumulated Other Comprehensive Income (Loss) | Treasury Stock | Total     |
|--------------------------------------------------------------------------------------------------------------|--------------|----------------------------|---------------------|-----------------------------------------------|----------------|-----------|
| Balance, beginning at Dec. 31, 2012                                                                          | $ 61         | $ 493,613                  | $ (424,105)         | $ (260)                                       | $ (2,741)      | $ 66,568  |
| Balance, beginning (in shares) at Dec. 31, 2012                                                              | 46,765,000   |                       |                |                                          | (200,000)      |      |
| Net loss                                                                                                     |         |                       | (23,521)            |                                          |           | (23,521)  |
| Other comprehensive income                                                                                   |         |                       |                | 68                                            |           | 68        |
| Compensation expenses for share-based payment arrangements                                                   |         | 2,099                      |                |                                          |           | 2,099     |
| Acquisition of subsidiary, net of issuance costs                                                             | 6            | 11,214                     |                |                                          |           | 11,220    |
| Stock Issued During Period, Shares, Acquisitions                                                             | 4,472,000    |                       |                |                                          |           |      |
| Sale of common stock in public offering, net of underwriting discounts and commissions and offering expenses | 11           | 34,832                     |                |                                          |           | 34,843    |
| Public Offering shares issued                                                                                | 8,500,000    |                       |                |                                          |           |      |
| Acquisition of subsidiary escrow shares returned                                                             |         |                       |                |                                          |           | 0         |
| Exercise of stock options                                                                                    | 0            | 3                          |                |                                          |           | 3         |
| Exercise of stock options (in shares)                                                                        | 1,000        |                       |                |                                          |           |      |
| Balance, ending at Jun. 30, 2013                                                                             | 78           | 541,761                    | (447,626)           | (192)                                         | (2,741)        | 91,280    |
| Balance, ending (in shares) at Jun. 30, 2013                                                                 | 59,738,000   |                       |                |                                          | (200,000)      |      |
| Balance, beginning at Dec. 31, 2013                                                                          | 79           | 548,510                    | (466,677)           | (192)                                         | (2,741)        | 78,979    |
| Balance, beginning (in shares) at Dec. 31, 2013                                                              | 61,025,000   |                       |                |                                          | (200,000)      |      |
| Net loss                                                                                                     |         |                       | (20,386)            |                                          |           | (20,386)  |
| Compensation expenses for share-based payment arrangements                                                   |         | 2,251                      |                |                                          |           | 2,251     |
| Sale of common stock in public offering, net of underwriting discounts and commissions and offering expenses | 12           | 37,447                     |                |                                          |           | 37,459    |
| Public Offering shares issued                                                                                | 8,750,000    |                       |                |                                          |           | 8,750,000 |
| Acquisition of subsidiary escrow shares returned - shares                                                    | (19,000)     |                       |                |                                          |           |      |
| Acquisition of subsidiary escrow shares returned                                                             |         | (82)                       |                |                                          |           | (82)      |
| Balance, ending at Jun. 30, 2014                                                                             | $ 91         | $ 588,126                  | $ (487,063)         | $ (192)                                       | $ (2,741)      | $ 98,221  |
| Balance, ending (in shares) at Jun. 30, 2014                                                                 | 69,756,000   |                       |                |                                          | (200,000)      |      |

| X                                                                                                                                                                                                                                                                                                |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount returned from escrow regarding relating to an acquisition.
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Number of shares returned from escrow regarding relating to an acquisition.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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| - Definition
Amount after tax and reclassification adjustments of other comprehensive income (loss).
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of shares of stock issued during the period pursuant to acquisitions.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of new stock issued during the period.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of share options (or share units) exercised during the current period.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Value of stock issued pursuant to acquisitions during the period.
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| - Definition
Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.
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| - Definition
Value of stock issued as a result of the exercise of stock options, after deduction of related income tax (expense) benefit.
+ References
No definition available.
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