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Quarterly Financial Data (Unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 02, 2015	Oct. 02, 2014	Jul. 02, 2014	Apr. 02, 2014	Jan. 02, 2014	Oct. 03, 2013	Jul. 03, 2013	Apr. 03, 2013	Jan. 02, 2015	Jan. 03, 2014	Dec. 28, 2012
Interim Period, Costs Not Allocable [Line Items]
Net sales	$ 16,573us-gaap_Revenues	$ 18,188us-gaap_Revenues	$ 20,048us-gaap_Revenues	$ 20,178us-gaap_Revenues	$ 18,944us-gaap_Revenues	$ 17,106us-gaap_Revenues	$ 18,164us-gaap_Revenues	$ 18,001us-gaap_Revenues
Gross profit	9,403us-gaap_GrossProfit	11,869us-gaap_GrossProfit	13,667us-gaap_GrossProfit	13,884us-gaap_GrossProfit	12,976us-gaap_GrossProfit	12,059us-gaap_GrossProfit	12,620us-gaap_GrossProfit	12,654us-gaap_GrossProfit	48,823us-gaap_GrossProfit	50,309us-gaap_GrossProfit	44,291us-gaap_GrossProfit
Net income (loss)	$ (2,538)us-gaap_NetIncomeLoss	$ (2,706)us-gaap_NetIncomeLoss	$ (1,789)us-gaap_NetIncomeLoss	$ (1,359)us-gaap_NetIncomeLoss	$ (876)us-gaap_NetIncomeLoss	$ 525us-gaap_NetIncomeLoss	$ 278us-gaap_NetIncomeLoss	$ 471us-gaap_NetIncomeLoss	$ (8,392)us-gaap_NetIncomeLoss	$ 398us-gaap_NetIncomeLoss	$ (1,763)us-gaap_NetIncomeLoss
Net income (loss) per share - basic (in dollars per share)	$ (0.07)us-gaap_EarningsPerShareBasic	$ (0.07)us-gaap_EarningsPerShareBasic	$ (0.05)us-gaap_EarningsPerShareBasic	$ (0.04)us-gaap_EarningsPerShareBasic	$ (0.02)us-gaap_EarningsPerShareBasic	$ 0.01us-gaap_EarningsPerShareBasic	$ 0.01us-gaap_EarningsPerShareBasic	$ 0.01us-gaap_EarningsPerShareBasic	$ (0.22)us-gaap_EarningsPerShareBasic	$ 0.01us-gaap_EarningsPerShareBasic	$ (0.05)us-gaap_EarningsPerShareBasic
Net income (loss) per share - diluted (in dollars per share)	$ (0.07)us-gaap_EarningsPerShareDiluted	$ (0.07)us-gaap_EarningsPerShareDiluted	$ (0.05)us-gaap_EarningsPerShareDiluted	$ (0.04)us-gaap_EarningsPerShareDiluted	$ (0.02)us-gaap_EarningsPerShareDiluted	$ 0.01us-gaap_EarningsPerShareDiluted	$ 0.01us-gaap_EarningsPerShareDiluted	$ 0.01us-gaap_EarningsPerShareDiluted	$ (0.22)us-gaap_EarningsPerShareDiluted	$ 0.01us-gaap_EarningsPerShareDiluted	$ (0.05)us-gaap_EarningsPerShareDiluted

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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