Stock Based Compensation - Summary of Activity in Stock Option Plan (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Oct. 03, 2015 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]
Outstanding, Number of Shares, Beginning Balance | shares	833,795
Number of Shares, Options Granted | shares	117,800
Number of Shares, Options Exercised | shares	(205,943)
Number of Shares, Options Cancelled or forfeited | shares	(153,966)
Outstanding, Number of Shares, Ending Balance | shares	591,686
Weighted Average Exercise Price Per Share, Beginning Balance	$ 4.88
Weighted Average Exercise Price Per Share , Options Granted	9.92
Weighted Average Exercise Price Per Share, Options Exercised	3.63
Weighted Average Exercise Price Per Share, Options Cancelled or forfeited	4.44
Weighted Average Exercise Price Per Share, Ending Balance	$ 6.43
Aggregate Intrinsic Value, Ending Balance | $	$ 1,030