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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)