Consolidated Statements of Stockholders' Equity (USD $)
In Thousands, except Share data
Common Stock [Member]
Additional Paid-In Capital [Member]
Common Stock Warrants [Member]
Accumulated Other Comprehensive Loss [Member]
Accumulated Deficit [Member]
Treasury Stock [Member]
Total
Balance at Dec. 31, 2011 $ 24 $ 158,080    $ (3) $ (118,656) $ (17,613) $ 21,832
Balance (in shares) at Dec. 31, 2011 20,565,000         3,602,000  
Issuance of common stock upon exercise of stock options   144          144
Issuance of common stock upon exercise of stock options (in shares) 120,000           120,000
Issuance of restricted common stock               
Issuance of restricted common stock (in shares) 15,000            
Stock-based compensation expense   1,206          1,206
Repurchase of treasury stock, (in shares) (8,000)            
Acquisition of treasury stock            (7) (7)
Acquisition of treasury stock, (in shares)           8,000 5,000
Net loss          (9,678)   (9,678)
Unrealized loss on available-for-sale securities, net of tax        3     3
Balance at Dec. 31, 2012 24 159,430      (128,334) (17,620) 13,500
Balance (in shares) at Dec. 31, 2012 20,692,000         3,610,000  
Issuance of common stock upon exercise of stock options 1 2,789          2,790
Issuance of common stock upon exercise of stock options (in shares) 930,000           930,000
Issuance of restricted common stock               
Issuance of restricted common stock (in shares) 30,000            
Stock-based compensation expense   1,461          1,461
Repurchase of treasury stock, (in shares) (5,000)            
Acquisition of treasury stock            (32) (32)
Acquisition of treasury stock, (in shares)           5,000 5,000
Net loss          (5,436)   (5,436)
Balance at Dec. 31, 2013 $ 25 $ 163,680      $ (133,770) $ (17,652) $ 12,283
Balance (in shares) at Dec. 31, 2013 21,647,000         3,615,000