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Consolidated Statements of Stockholders' Equity (USD $)
In Thousands, except Share data, unless otherwise specified
Total
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Accumulated Other Comprehensive Income
Beginning Balance Value at Jan. 01, 2011 $ 170,849 $ 22 $ 225,755 $ (57,000) $ 2,072
Beginning Balance Shares at Jan. 01, 2011   22,314,783      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) 28,685     28,685  
Employee benefit plan adjustment (39)       (39)
Foreign currency translation adjustments (484)       (484)
Issuance of common stock under stock-based compensation plans 10,765 1 10,764    
Issuance of common stock under stock-based compensation plans, Shares   1,133,028      
Stock-based compensation expense 4,473   4,473    
Repurchases and retirement of common stock (4,257)   (4,257)    
Repurchases and retirement of common stock, Shares   (265,040)      
Ending Balance Value at Dec. 31, 2011 209,992 23 236,735 (28,315) 1,549
Ending Balance Shares at Dec. 31, 2011   23,182,771      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) 4,465     4,465  
Employee benefit plan adjustment (11)       (11)
Foreign currency translation adjustments (264)       (264)
Unrealized gain (loss) on investments, net of tax (2)       (2)
Issuance of common stock under stock-based compensation plans 4,205   4,205    
Issuance of common stock under stock-based compensation plans, Shares   655,424      
Stock-based compensation expense 5,890   5,890    
Repurchases and retirement of common stock (8,504)   (8,504)    
Repurchases and retirement of common stock, Shares (587,766) (587,766)      
Ending Balance Value at Dec. 29, 2012 215,771 23 238,326 (23,850) 1,272
Ending Balance Shares at Dec. 29, 2012 23,250,429 23,250,429      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) (14,146)     (14,146)  
Employee benefit plan adjustment 151       151
Foreign currency translation adjustments (818)       (818)
Unrealized gain (loss) on investments, net of tax 7       7
Issuance of common stock under stock-based compensation plans 3,734 1 3,733    
Issuance of common stock under stock-based compensation plans, Shares   619,617      
Stock-based compensation expense 7,674   7,674    
Repurchases and retirement of common stock (5,000) 0 (5,000)    
Repurchases and retirement of common stock, Shares (332,771) (332,771)      
Ending Balance Value at Dec. 28, 2013 $ 207,373 $ 24 $ 244,733 $ (37,996) $ 612
Ending Balance Shares at Dec. 28, 2013 23,537,275 23,537,275