Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share (Detail)

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Net Loss Per Share - Computation of Basic and Diluted Net Loss Per Share (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Jun. 28, 2014
Jun. 29, 2013
Dec. 28, 2013
Dec. 29, 2012
Earnings Per Share [Abstract]            
Net loss $ (2,180) $ (9,567) $ (1,979) $ (12,910) $ (15,634) $ (35,978)
Dividends on Series A Convertible Preferred Stock 60 64 119 64    
Net loss available to common shares $ (2,240) $ (9,631) $ (2,098) $ (12,974)    
Denominator:            
Weighted-average common shares outstanding (basic) 33,460 33,119 33,422 32,130    
Common equivalent shares from common stock options and warrants 0   0      
Weighted-average common shares outstanding (diluted) 33,460 33,119 33,422 32,130    
Basic and diluted net loss per share $ (0.07) $ (0.29) $ (0.06) $ (0.40)