CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)
In Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2011 $ 82,729 $ 409 $ 456,056 $ 10,250 $ (383,986)
Beginning balance, Shares at Dec. 31, 2011   40,928      
Net income (9,040)       (9,040)
Net unrealized change on investments (net of tax of $0) (1,546)     (1,546)  
Forfeitures and repurchases of restricted common stock, Value (6)   (6)    
Forfeitures and repurchases of restricted common stock, Shares   (6)      
Stock-based compensation, Value 604   604    
Issuance of shares under Employee Stock Purchase Plan, Value 52 1 51    
Issuance of shares under Employee Stock Purchase Plan, Shares   40      
Ending balance at Dec. 31, 2012 72,793 410 456,705 8,704 (393,026)
Ending balance, Shares at Dec. 31, 2012   40,962      
Net income 9,180       9,180
Net unrealized change on investments (net of tax of $0) (5,329)     (5,329)  
Forfeitures and repurchases of restricted common stock, Value (7) (1) (6)    
Forfeitures and repurchases of restricted common stock, Shares   (19)      
Stock-based compensation, Value 243   243    
Stock-based compensation, Shares   5      
Issuance of shares under Employee Stock Purchase Plan, Value 52 1 51    
Issuance of shares under Employee Stock Purchase Plan, Shares   35      
Ending balance at Dec. 31, 2013 76,932 410 456,993 3,375 (383,846)
Ending balance, Shares at Dec. 31, 2013 40,983 40,983      
Net income 28,068       28,068
Net unrealized change on investments (net of tax of $0) 1,715     1,715  
Forfeitures and repurchases of restricted common stock, Value (10)   (10)    
Forfeitures and repurchases of restricted common stock, Shares   (4)      
Stock-based compensation, Value 185   185    
Stock-based compensation, Shares   6      
Issuance of shares under Employee Stock Purchase Plan, Value 74   74    
Issuance of shares under Employee Stock Purchase Plan, Shares   31      
Ending balance at Dec. 31, 2014 $ 106,964 $ 410 $ 457,242 $ 5,090 $ (355,778)
Ending balance, Shares at Dec. 31, 2014 41,016 41,016