Acquisition (Details 3) (USD $)	3 Months Ended	6 Months Ended
Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012	May 28, 2013
Acquisition
Net revenues	$ 53,677,000	$ 48,016,000	$ 102,214,000	$ 95,036,000
Net income	1,407,000	1,623,000	2,463,000	3,345,000
Diluted earnings per share (in dollars per share)	$ 0.07	$ 0.08	$ 0.13	$ 0.17
WVFC
Acquisition
Excess purchase price over fair value of net assets acquired ("goodwill")	3,100,000		3,100,000		3,147,000
Tax deductible amount of goodwill	0		0
Net revenues	53,677,000	48,016,000	102,214,000	95,036,000
Pro forma net revenues	56,884,000	51,247,000	108,645,000	101,707,000
Net income	1,407,000	1,623,000	2,463,000	3,345,000
Pro forma net income	$ 1,564,000	$ 1,637,000	$ 2,706,000	$ 3,374,000
Diluted earnings per share (in dollars per share)	$ 0.07	$ 0.08	$ 0.13	$ 0.17
Pro forma Diluted earnings per share (in dollars per share)	$ 0.08	$ 0.08	$ 0.14	$ 0.17

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