Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Apr. 04, 2015	Mar. 29, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 246us-gaap_NetIncomeLoss	$ 487us-gaap_NetIncomeLoss
Other comprehensive income, net of tax	0	0
Comprehensive income	$ 246us-gaap_ComprehensiveIncomeNetOfTax	$ 487us-gaap_ComprehensiveIncomeNetOfTax

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration