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Income Taxes (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Amounts computed at statutory federal rate |  |  |  |  |  |  |  |  | $ 2,786 | $ 13,198 | $ 3,843
State taxes net of federal benefit |  |  |  |  |  |  |  |  | 175 | 386 | 697
Meals & entertainment |  |  |  |  |  |  |  |  | 16 | 16 | 9
Imputed interest |  |  |  |  |  |  |  |  | (1) | (161) | 53
Section 162(m) limitation |  |  |  |  |  |  |  |  | 94 | 197 | 490
Contingent liabilities |  |  |  |  |  |  |  |  | 1,225 | 1,684 | 1,748
Stock-based compensation |  |  |  |  |  |  |  |  | 263 | 140 | 89
Expired NOLs |  |  |  |  |  |  |  |  | 0 | 232 | 88
Research and development credits |  |  |  |  |  |  |  |  | (1,525) | 304 | (113)
Change in uncertain tax positions |  |  |  |  |  |  |  |  | 1,423 | 27,188 | 7
Rate change for changes in state law |  |  |  |  |  |  |  |  | 25 | (5,756) | 119
APIC Excess Tax Benefit True Up |  |  |  |  |  |  |  |  | (622) | 0 | 0
Increase in deferred tax assets from completion of 382 analysis |  |  |  |  |  |  |  |  | (120) | 3,329 | 43
Avinza true up |  |  |  |  |  |  |  |  | 0 | (2,107) | 0
Change in valuation allowance |  |  |  |  |  |  |  |  | 6,283 | (231,370) | (7,243)
Other |  |  |  |  |  |  |  |  | 305 | 605 | 580
Income tax expense from continuing operations | $ 10,354 | $ 160 | $ (3,881) | $ 3,694 | $ (514) | $ (191,881) | $ 265 | $ 15 | $ 10,327 | $ (192,115) | $ 410

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