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Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 30, 2016	Sep. 30, 2016	Jul. 01, 2016	Apr. 01, 2016	Jan. 01, 2016	Oct. 02, 2015	Jul. 03, 2015	Apr. 03, 2015	Dec. 30, 2016	Jan. 01, 2016	Jan. 02, 2015
Numerator:
Net loss	$ (166)	$ (1,778)	$ (2,143)	$ (8,041)	$ (842)	$ (1,752)	$ (1,599)	$ (2,340)	$ (12,129)	$ (6,533)	$ (8,392)
Weighted average common shares and denominator for basic and diluted calculation:
Weighted average common shares outstanding									40,352	39,384	38,342
Less: Unvested restricted stock									(23)	(124)	(251)
Denominator for basic calculation									40,329	39,260	38,091
Denominator for diluted calculation									40,329	39,260	38,091
Weighted average effects of potentially dilutive common stock:
Warrants									0	0	0
Net loss per share - basic and diluted (in dollars per share)	$ 0	$ (40)	$ (50)	$ (200)	$ (20)	$ (40)	$ (40)	$ (60)	$ (0.30)	$ (0.17)	$ (0.22)
Employee Stock Option [Member]
Weighted average effects of potentially dilutive common stock:
Weighted Average Number Diluted Shares Outstanding Adjustment, Total									0	0	0
Restricted Stock [Member]
Weighted average effects of potentially dilutive common stock:
Weighted Average Number Diluted Shares Outstanding Adjustment, Total									0	0	0
Restricted Stock Units (RSUs) [Member]
Weighted average effects of potentially dilutive common stock:
Weighted Average Number Diluted Shares Outstanding Adjustment, Total									0	0	0

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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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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.

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