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Consolidated Statements Of Stockholders' Deficit - 9 months ended Sep. 30, 2015 - USD ($) $ in Thousands | Total | Preferred Shares | Common Shares | Treasury Stock | Additional Paid-in Capital | Accumulated Deficit
--- | --- | --- | --- | --- | --- | ---
Beginning Balance (in shares) at Dec. 31, 2014 |  |  | 174,610,451 | (20,079) |  |
Beginning Balance at Dec. 31, 2014 | $ (88,448) |  | $ 143,113 | $ (217) | $ 738,890 | $ (970,234)
Issuance of Series A Convertible Preferred Stock, net (in shares) |  | 391,017,970 |  |  |  |
Issuance of Series A Convertible Preferred Stock, net | 57,853 | $ 29,168 |  |  | 28,685 |
Conversion of Series A Convertible Preferred Stock, net (in shares) |  | (62,833,330) | 6,283,333 |  |  |
Conversion of Series A Convertible Preferred Stock, net | (187) | $ (4,804) | $ 4,804 |  | (187) |
Preferred stock purchase option | $ 946 |  |  |  | 1,814 | (868)
Preferred stock beneficial conversion features |  |  |  |  | 32,987 | (32,987)
Exercise of stock options (in shares) | 18,020 |  | 18,020 |  |  |
Exercise of stock options | $ 31 |  | $ 13 |  | 18 |
Exercise of warrants (in shares) | 1,844,585 |  | 1,844,585 |  |  |
Exercise of warrants | $ 2,713 |  | $ 1,429 |  | 1,284 |
Vesting of restricted stock units (in shares) |  |  | 724,188 | (131,992) |  |
Vesting of restricted stock units | (151) |  | $ 547 | $ (151) | (547) |
Tax provision on stock-based compensation | (707) |  |  |  | (707) |
Stock-based compensation | 10,172 |  |  |  | 10,172 |
Loss for the period | (93,313) |  |  |  |  | (93,313)
Ending Balance (in shares) at Sep. 30, 2015 |  | 328,184,640 | 183,480,577 | (152,071) |  |
Ending Balance at Sep. 30, 2015 | $ (111,091) | $ 24,364 | $ 149,906 | $ (368) | $ 812,409 | $ (1,097,402)

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