Consolidated Statements Of Changes In Shareholders' Equity (USD $)
In Thousands, except Share data
Preferred Stock [Member]
Common Stock [Member]
USD ($)
Treasury Stock [Member]
USD ($)
Additional Paid-In Capital [Member]
USD ($)
Accumulated Deficit [Member]
USD ($)
Total
USD ($)
Balance at Dec. 31, 2008   $ 15   $ 204,818 $ (201,172) $ 3,661
Balance, shares at Dec. 31, 2008 5,739 15,213,959        
Cumulative effect of change in accounting principle       (15,091) 12,961 (2,130)
Fair value of warrants reclassified from liability to equity upon exercise       1,785   1,785
Issuance of common stock for services       304   304
Issuance of common stock for services, shares   498,533        
Expiration of put options   1   428   429
Expiration of put options, shares   522,500        
Cashless exercise of common stock warrants   1   (1)    
Cashless exercise of common stock warrants, shares   726,910       726,910
Conversion of Series B Preferred Stock to common stock             
Exercise of common stock options       5   5
Exercise of common stock options, shares   5,342        
Stock- based compensation       1,110   1,110
Net income (loss)         (2,271) (2,271)
Balance at Dec. 31, 2009   17   193,358 (190,482) 2,893
Balance, shares at Dec. 31, 2009 5,739 16,967,244        
Fair value of warrants reclassified from liability to equity upon exercise       10,013   10,013
Issuance of common stock for services       55   55
Issuance of common stock for services, shares   15,363        
Cashless exercise of common stock warrants   4   (4)    
Cashless exercise of common stock warrants, shares   3,518,110       3,518,110
Conversion of Series B Preferred Stock to common stock             
Conversion of Series B Preferred Stock to common stock, shares (60) 80,000       60
Exercise of common stock warrants       250   250
Exercise of common stock warrants, shares   100,000        
Exercise of common stock options       805   805
Exercise of common stock options, shares   529,728        
Stock- based compensation       1,821   1,821
Net income (loss)         (1,140) (1,140)
Balance at Dec. 31, 2010   21   206,298 (191,622) 14,697
Balance, shares at Dec. 31, 2010 5,679 21,210,445        
Fair value of warrants reclassified from liability to equity upon exercise       10,304   10,304
Cashless exercise of common stock warrants   1   (1)    
Cashless exercise of common stock warrants, shares   476,663       476,673
Conversion of Series B Preferred Stock to common stock             
Conversion of Series B Preferred Stock to common stock, shares (20) 26,666       20
Exercise of common stock warrants   1   561   562
Exercise of common stock warrants, shares   1,072,116        
Cashless exercise of common stock options, shares   49,685        
Exercise of common stock options   1   769   770
Exercise of common stock options, shares   678,403        
Stock- based compensation       2,907   2,907
Purchase of treasury stock     (95)     (95)
Net income (loss)         4,966 4,966
Purchase of treasury stock, shares     (25,000)      
Balance at Dec. 31, 2011   $ 24 $ (95) $ 220,838 $ (186,656) $ 34,111
Balance, shares at Dec. 31, 2011 5,659 23,513,978 (25,000)