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Consolidated Statements of Changes in Stockholders’ Equity (Deficit) - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Deficit
--- | --- | --- | --- | ---
Beginning Balances (in shares) at Dec. 31, 2013 |  | 21,661,908 |  |
Beginning Balances at Dec. 31, 2013 | $ (6,167) | $ 22 | $ 106,086 | $ (112,275)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Stock-based compensation (in shares) |  | 40,729 |  |
Stock-based compensation | 4,712 |  | 4,712 |
Issuance of stock to 401(k) plan (in shares) |  | 5,250 |  |
Issuance of stock to 401(k) plan | 127 |  | 127 |
Issuance of stock upon exercise of options, net (in shares) |  | 260,126 |  |
Issuance of stock upon exercise of options, net | 243 |  | 243 |
Repurchase of shares to satisfy tax withholdings (in shares) |  | (114,750) |  |
Repurchase of shares to satisfy tax withholdings | (1,500) |  | (1,500) |
Reclassification and settlement of equity awards | 501 |  | 501 |
Net income (loss) | 1,387 |  |  | 1,387
Ending Balances (in shares) at Dec. 31, 2014 |  | 21,853,263 |  |
Ending Balances at Dec. 31, 2014 | (697) | $ 22 | 110,169 | (110,888)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Stock-based compensation (in shares) |  | 127,867 |  |
Stock-based compensation | 6,462 |  | 6,462 |
Clawback of equity awards (in shares) |  | (20,656) |  |
Clawback of equity awards | (325) |  | (325) |
Repurchase of shares to satisfy tax withholdings (in shares) |  | (16,602) |  |
Repurchase of shares to satisfy tax withholdings | (277) |  | (277) |
Net income (loss) | (30,141) |  |  | (30,141)
Ending Balances (in shares) at Dec. 31, 2015 |  | 21,943,872 |  |
Ending Balances at Dec. 31, 2015 | (24,978) | $ 22 | 116,029 | (141,029)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Stock-based compensation (in shares) |  | 405,354 |  |
Stock-based compensation | 2,762 |  | 2,762 |
Repurchase of shares to satisfy tax withholdings (in shares) |  | (27,204) |  |
Repurchase of shares to satisfy tax withholdings | (196) |  | (196) |
Reclassification and settlement of equity awards | 899 |  | 899 |
Net income (loss) | 97,678 |  |  | 97,678
Ending Balances (in shares) at Dec. 31, 2016 |  | 22,322,022 |  |
Ending Balances at Dec. 31, 2016 | $ 76,165 | $ 22 | $ 119,494 | $ (43,351)

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