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Consolidated Statements Of Stockholders' Equity And Comprehensive Income (Loss) (USD $)
In Thousands, unless otherwise specified
Common Stock [Member]
Additional Paid-In Capital [Member]
Treasury Stock [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Total Comprehensive Income (Loss) [Member]
Total
Balance at Dec. 31, 2008 $ 30 $ 407,252 $ (25,000) $ (184,382) $ 62   $ 197,962
Balance, shares at Dec. 31, 2008 30,327            
Exercise of stock options, vesting of restricted stock units and shares issued under employee stock purchase plan 1 2,669 0 0 0   2,670
Exercise of stock options, vesting of restricted stock units and shares issued under employee stock purchase plan, shares 765            
Taxes withheld on net settled exercises 0 (224) 0 0 0   (224)
Share-based compensation 0 6,882 0 0 0   6,882
Net income (loss) 0 0 0 3,912 0 3,912 3,912
Other comprehensive income (loss):              
Unrealized gain (loss) on marketable securities, net of taxes 0 0 0 0 (47) (47) (47)
Total comprehensive income (loss)           3,865  
Balance at Dec. 31, 2009 31 416,579 (25,000) (180,470) 15   211,155
Balance, shares at Dec. 31, 2009 31,092            
Exercise of stock options, vesting of restricted stock units and shares issued under employee stock purchase plan 1 1,490 0 0 0   1,491
Exercise of stock options, vesting of restricted stock units and shares issued under employee stock purchase plan, shares 760            
Net tax effect from stock options exercised 0 (270) 0 0 0   (270)
Share-based compensation 0 6,471 0 0 0   6,471
Net income (loss) 0 0 0 (33,450) 0 (33,450) (33,450)
Other comprehensive income (loss):              
Unrealized gain (loss) on marketable securities, net of taxes 0 0 0 0 6 6 6
Total comprehensive income (loss)           (33,444)  
Balance at Dec. 31, 2010 32 424,270 (25,000) (213,920) 21   185,403
Balance, shares at Dec. 31, 2010 31,852            
Exercise of stock options, vesting of restricted stock units and shares issued under employee stock purchase plan 0 504 0 0 0   504
Exercise of stock options, vesting of restricted stock units and shares issued under employee stock purchase plan, shares 410            
Taxes withheld on net settled vesting of restricted stock units 0 (700) 0 0 0   (700)
Net tax effect from stock options exercised 0 (244) 0 0 0   (244)
Share-based compensation 0 5,983 0 0 0   5,983
Net income (loss) 0 0 0 (24,892) 0 (24,892) (24,892)
Other comprehensive income (loss):              
Unrealized gain (loss) on marketable securities, net of taxes 0 0 0 0 (29) (29) (29)
Total comprehensive income (loss)           (24,921)  
Balance at Dec. 31, 2011 $ 32 $ 429,813 $ (25,000) $ (238,812) $ (8)   $ 166,025
Balance, shares at Dec. 31, 2011 32,262