Stock Based Compensation (Details Textual) (USD $)	3 Months Ended		9 Months Ended					0 Months Ended	9 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Jul. 31, 2014	Feb. 28, 2013	Feb. 28, 2012	Jan. 04, 2014 Restricted Stock Units (RSUs)	Sep. 27, 2014 Restricted Stock Units (RSUs)	Sep. 27, 2014 Restricted Stock Units (RSUs) Maximum	Sep. 27, 2014 Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average grant date fair value of the options granted	$ 3.54	$ 3.19	$ 4.06	$ 3.12
Dividend yield	0.00%	0.00%	0.00%	0.00%
Stock-based compensation capitalized into inventory	$ 23,000	$ 17,000
Total intrinsic value of options exercised			354,000	231,000
Total unrecognized compensation cost, net of expected forfeitures, related to non-vested share-based compensation arrangements under the Incentive Plan	1,500,000		1,500,000
Compensation cost recognition, weighted average period (years)			2 years 7 months 6 days
Period consider for calculation of average stock price performance prior awards vesting									2 months
Period consider for calculation of average stock price performance after awards vesting									2 months
Restricted stock units granted								50,000	59,780		2,445
Restricted stock units, calculated stock price										$ 11.00
Weighted grant date fair value of restricted stock units granted									314,000		20,000
Weighted-average grant date fair value of restricted stock units granted									$ 5.25		$ 8.18
Stock repurchase program authorized amount					3,000,000	3,000,000	4,000,000
Stock repurchase, shares			406,245
Shares repurchased price, per share			$ 8.40
Common shares under the stock repurchase program	$ 2,200,000		$ 2,200,000