Stock Based Compensation - Summary of Activity in Stock Option Plan (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jul. 02, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]
Outstanding, Number of Shares, Beginning Balance | shares	551,492
Number of Shares, Options Granted | shares	41,900
Number of Shares, Options Exercised | shares	(88,417)
Number of Shares, Options Cancelled or forfeited | shares	(49,995)
Outstanding, Number of Shares, Ending Balance | shares	454,980
Weighted Average Exercise Price Per Share, Beginning Balance | $ / shares	$ 6.92
Weighted Average Exercise Price Per Share, Options Granted | $ / shares	10.60
Weighted Average Exercise Price Per Share, Options Exercised | $ / shares	4.67
Weighted Average Exercise Price Per Share, Options Cancelled or forfeited | $ / shares	8.58
Weighted Average Exercise Price Per Share, Ending Balance | $ / shares	$ 7.51
Aggregate Intrinsic Value, Ending Balance | $	$ 3,638