Stock-Based Compensation - Summary of Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 20, 2017	Jan. 03, 2017
Shares
Options outstanding, Beginning balance (in shares)	334,500
Granted (in shares)	5,000
Exercised (in shares)	(1,000)
Forfeited (in shares)	(3,500)
Options outstanding, Ending balance (in shares)	335,000	334,500
Options exercisable (in shares)	53,000
Options exercisable and expected to vest (in shares)	316,050
Weighted Average Exercise Price
Weighted Average Exercise Price, Options outstanding, Beginning balance (in dollars per share)	$ 9.94
Weighted Average Exercise Price, Granted (in dollars per share)	14.55
Weighted Average Exercise Price, Exercised (in dollars per share)	9.88
Weighted Average Exercise Price, Forfeited (in dollars per share)	10.40
Weighted Average Exercise Price, Options outstanding, Ending balance (in dollars per share)	10.01	$ 9.94
Weighted Average Exercise Price, Options exercisable (in dollars per share)	10.39
Weighted Average Exercise Price, Options exercisable and expected (in dollars per share)	$ 10.02
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted Average Remaining Contractual Term, Options outstanding (in years)	5 years 8 months 12 days	6 years 1 month
Weighted Average Remaining Contractual Term, Options exercisable (in years)	5 years 4 months 24 days
Weighted Average Remaining Contractual Term, Options exercisable and expected to vest (in years)	5 years 8 months 12 days
Aggregate Intrinsic Value, Options outstanding, Beginning balance	$ 1,464
Aggregate Intrinsic Value, Options outstanding, Ending balance	1,252	$ 1,464
Aggregate Intrinsic Value, Options exercisable	177
Aggregate Intrinsic Value, Options excersiable and expected to vest	$ 1,178