Stock Based Compensation - Summary of Activity under Incentive Plan (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Oct. 01, 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	79,777
Number of Shares, Options Exercised | shares	(117,576)
Number of Shares, Options Cancelled or forfeited | shares	(51,307)
Outstanding, Number of Shares, Ending Balance | shares	462,386
Outstanding, Weighted Average Exercise Price Per Share, Beginning Balance | $ / shares	$ 6.92
Weighted Average Exercise Price Per Share, Options Granted | $ / shares	13.30
Weighted Average Exercise Price Per Share, Options Exercised | $ / shares	5.53
Weighted Average Exercise Price Per Share, Options Cancelled or forfeited | $ / shares	8.56
Outstanding, Weighted Average Exercise Price Per Share, Ending Balance | $ / shares	$ 8.19
Aggregate Intrinsic Value, Ending Balance | $	$ 2,980