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Income Taxes (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Amounts computed at statutory federal rate |  |  |  |  |  |  |  |  | $ (13,198) | $ (3,843) | $ (3,131)
State taxes net of federal benefit |  |  |  |  |  |  |  |  | (386) | (697) | (293)
Meals & entertainment |  |  |  |  |  |  |  |  | (16) | (9) | (10)
Imputed interest |  |  |  |  |  |  |  |  | 161 | (53) | (285)
Section 162(m) limitation |  |  |  |  |  |  |  |  | (197) | (490) | 0
Contingent liabilities |  |  |  |  |  |  |  |  | (1,684) | (1,748) | (2,027)
Stock-based compensation |  |  |  |  |  |  |  |  | (140) | (89) | 556
Expired NOLs |  |  |  |  |  |  |  |  | (232) | (88) | 0
Research and development credits |  |  |  |  |  |  |  |  | (304) | 113 | 4,581
Change in uncertain tax positions |  |  |  |  |  |  |  |  | (27,188) | (7) | (364)
Rate change for changes in state law |  |  |  |  |  |  |  |  | 5,756 | (119) | (901)
Increase in deferred tax assets from completion of 382 analysis |  |  |  |  |  |  |  |  | (3,329) | (43) | (786)
Avinza true up |  |  |  |  |  |  |  |  | 2,107 | 0 | 0
Change in valuation allowance |  |  |  |  |  |  |  |  | 231,370 | 7,243 | 3,509
Other |  |  |  |  |  |  |  |  | (605) | (580) | (1,223)
Income tax expense from continuing operations | $ 514 | $ 191,881 | $ (265) | $ (15) | $ (280) | $ (124) | $ 47 | $ (53) | $ 192,115 | $ (410) | $ (374)

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