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Consolidated Statements of Stockholders’ Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Deficit | Accumulated Other Comprehensive Income (Loss) | Nil Coupon Perpetual Loan Notes | Treasury Stock
--- | --- | --- | --- | --- | --- | --- | ---
Balance (in Shares) at Dec. 31, 2013 |  | 22,593,000 |  |  |  |  |
Balance at Dec. 31, 2013 | $ 88,623 | $ 227 | $ 132,796 | $ (44,027) | $ 37 | $ 76 | $ (486)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net (loss) | (17,725) |  |  | (17,725) |  |  |
Foreign currency translation adjustments | (489) |  |  |  | (489) |  |
Unrealized (losses)/gains from marketable securities, net of tax | 4 |  |  |  | 4 |  |
Exercise of stock options (in shares) |  | 60,000 |  |  |  |  |
Exercise of stock options | 297 |  | 297 |  |  |  |
Tax benefit from stock compensation expense | 7 |  | 7 |  |  |  |
Stock compensation expense | 2,322 |  | 2,322 |  |  |  |
Tax effect of expired vested options | (379) |  | (379) |  |  |  |
Common shares issued upon vesting of restricted stock units (in shares) |  | 266,000 |  |  |  |  |
Common shares issued upon vesting of restricted stock units | (55) | $ 3 | (58) |  |  |  |
Treasury shares withheld (in shares) |  | (59,000) |  |  |  |  |
Treasury shares withheld | (304) |  |  |  |  |  | (304)
Balance (in Shares) at Dec. 31, 2014 |  | 22,860,000 |  |  |  |  |
Balance at Dec. 31, 2014 | 72,301 | $ 230 | 134,985 | (61,752) | (448) | 76 | (790)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net (loss) | (12,380) |  |  | (12,380) |  |  |
Foreign currency translation adjustments | (1,097) |  |  |  | (1,097) |  |
Unrealized (losses)/gains from marketable securities, net of tax | (11) |  |  |  | (11) |  |
Stock compensation expense | 1,809 |  | 1,809 |  |  |  |
Issuance of Deferred Director's shares (in shares) |  | 39,000 |  |  |  |  |
Issuance of Deferred Director's shares | (70) | $ 1 | (71) |  |  |  |
Tax effect of expired vested options | (908) |  | (908) |  |  |  |
Common shares issued upon vesting of restricted stock units (in shares) |  | 352,000 |  |  |  |  |
Common shares issued upon vesting of restricted stock units | $ (418) | $ 3 | (421) |  |  |  |
Treasury shares withheld (in shares) | (84,486) | (84,000) |  |  |  |  |
Treasury shares withheld | $ (252) |  |  |  |  |  | (252)
Balance (in Shares) at Dec. 31, 2015 |  | 23,167,000 |  |  |  |  |
Balance at Dec. 31, 2015 | 58,974 | $ 234 | 135,394 | (74,132) | (1,556) | 76 | (1,042)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net (loss) | (17,388) |  |  | (17,388) |  |  |
Foreign currency translation adjustments | (6) |  |  |  | (6) |  |
Unrealized (losses)/gains from marketable securities, net of tax | (6) |  |  |  | (6) |  |
Stock compensation expense | 1,991 |  | 1,991 |  |  |  |
Common shares issued upon vesting of restricted stock units (in shares) |  | 382,000 |  |  |  |  |
Common shares issued upon vesting of restricted stock units | $ (1) | $ 4 | (5) |  |  |  |
Treasury shares withheld (in shares) | (103,097) | (103,000) |  |  |  |  |
Treasury shares withheld | $ (172) |  |  |  |  |  | (172)
Balance (in Shares) at Dec. 31, 2016 |  | 23,446,000 |  |  |  |  |
Balance at Dec. 31, 2016 | $ 43,392 | $ 238 | $ 137,380 | $ (91,520) | $ (1,568) | $ 76 | $ (1,214)

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