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Basic and Diluted Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Oct. 02, 2015	Oct. 03, 2014
Numerator:
Net loss	$ (1,752)	$ (2,706)	$ (5,690)	$ (5,854)
Weighted average common shares and denominator for basic and diluted calculation:
Weighted average common shares outstanding	39,851	38,618	39,533	38,311
Less: Unvested restricted stock	(124)	(249)	(124)	(267)
Denominator for basic and diluted calculation	39,727	38,369	39,409	38,044
Weighted average effects of potentially dilutive common stock:
Net loss per share - basic and diluted (in dollars per share)	$ (0.04)	$ (0.07)	$ (0.14)	$ (0.15)

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Incremental common shares attributable to dilutive effect of nonvested restricted stock.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Number of shares of common stock subject to repurchase or cancellation determined by relating the portion of time within a reporting period that these shares have been outstanding to the total time in that period. Common stock subject to repurchase are outstanding common shares that are contingently returnable (that is, subject to recall).

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