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 9 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Earnings Per Share [Abstract]        
Net loss $ (2,494) $ (1,399) $ (4,473) $ (14,309)
Dividends on Series A Convertible Preferred Stock 61 60 180 124
Net loss available to common shares $ (2,555) $ (1,459) $ (4,653) $ (14,433)
Weighted-average common shares outstanding (basic) (in shares) 33,532 33,218 33,459 32,493
Common equivalent shares from common stock options and warrants (in shares) 0 0 0 0
Weighted-average common shares outstanding (diluted) (in shares) 33,532 33,218 33,459 32,493
Basic and diluted net loss per share (in dollars per share) $ (0.08) $ (0.04) $ (0.14) $ (0.44)