Stockholders' Equity - Summary of Activity in Stock Option Plan (Details) - $ / shares	12 Months Ended
	Jan. 02, 2016	Jan. 03, 2015	Dec. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]
Shares Available for Grant, Beginning Balance	854,117	476,545	741,978
Shares Available for Grant, Additional shares reserved	1,000	503,306	52,128
Shares Available for Grant, Options granted	(170,300)	(158,300)	(149,600)
Shares Available for Grant, Restricted stock granted	(227,905)	(62,225)	(234,012)
Shares Available for Grant, Options cancelled	174,870	27,957	123,679
Shares Available for Grant, Awards cancelled	146,000	79,890
Shares Available for Grant, Options expired	(7,000)	(13,056)	(57,628)
Shares Available for Grant, Ending Balance	770,782	854,117	476,545
Outstanding, Number of Shares, Beginning Balance	833,795	1,102,842	1,570,543
Number of Shares, Options granted	170,300	158,300	149,600
Number of Shares, Options exercised	(277,733)	(399,390)	(493,622)
Number of Shares, Options cancelled	(174,870)	(27,957)	(123,679)
Number of Shares, Ending Balance	551,492	833,795	1,102,842
Weighted Average Exercise Price, Beginning Balance	$ 4.88	$ 3.97	$ 3.63
Weighted Average Exercise Price, Options granted	9.38	8.61	5.69
Weighted Average Exercise Price, Options exercised	3.70	3.76	3.03
Weighted Average Exercise Price, Options cancelled	4.71	6.13	5.64
Weighted Average Exercise Price, Ending Balance	$ 6.92	$ 4.88	$ 3.97