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Consolidated Statements of Stockholders' Equity (USD $)
In Thousands, except Share data
Total
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Balance at Dec. 31, 2009 $ 16,028 $ 1,145 $ 149,487 $ (134,604)
Balance, shares at Dec. 31, 2009   114,535,000    
Restricted stock issued, net   5 (5)  
Restricted stock issued net, shares   501,000    
Exercise of stock options, net 1 2 (1)  
Exercise of stock options net, shares 452,474 235,000    
Stock issued for services 29   29  
Stock issued for services, shares   20,000    
Stock-based compensation 8,726   8,726  
Net income/(loss) (7,549)     (7,549)
Balance at Dec. 31, 2010 17,235 1,152 158,236 (142,153)
Balance, shares at Dec. 31, 2010   115,291,000    
Restricted stock issued, net   5 (5)  
Restricted stock issued net, shares   535,000    
Shares repurchased (2,153) (3) (2,150)  
Shares repurchased, shares   (386,000)    
Exercise of stock options, net 538 13 525  
Exercise of stock options net, shares 1,280,687 1,243,000    
Stock issued for services 127   127  
Stock issued for services, shares   20,000    
Stock-based compensation 7,014   7,014  
Net income/(loss) 3,092     3,092
Balance at Dec. 31, 2011 25,853 1,167 163,747 (139,061)
Balance, shares at Dec. 31, 2011   116,703,000    
Net proceeds from sale of common stock 4,329 10 4,319  
Net proceeds from sale of common stock, shares   1,000,000    
Restricted stock issued, net   12 (12)  
Restricted stock issued net, shares   1,179,000    
Shares repurchased (2,261) (4) (2,257)  
Shares repurchased, shares (357,123) (357,000)    
Exercise of stock options, net 4,672 80 4,592  
Exercise of stock options net, shares 8,018,516 8,019,000    
Stock issued for services 28   28  
Stock issued for services, shares   10,000    
Stock-based compensation 7,409   7,409  
Net income/(loss) 11,030     11,030
Balance at Dec. 31, 2012 $ 51,060 $ 1,265 $ 177,826 $ (128,031)
Balance, shares at Dec. 31, 2012   126,554,000