Organization and Significant Accounting Policies - Schedule of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 30, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding, Shares, Beginning balance	136,459
Granted, Shares	0
Exercised, Shares	(112,362)
Cancelled, Shares	(13,825)
Outstanding, Shares, Ending balance	10,272	136,459
Options exercisable, Shares	10,272
Weighted Average Exercise Price, Outstanding, Beginning balance	$ 13.15
Granted, Weighted Average Exercise Price	0
Exercised, Weighted Average Exercise Price	13.97
Canceled, Weighted Average Exercise Price	14.56
Weighted Average Exercise Price, Outstanding, Ending balance	2.32	$ 13.15
Options exercisable, Weighted Average Exercise Price	$ 2.32
Weighted Average Remaining Contractual Life (years), Outstanding	1 year 7 months 6 days	6 months 25 days
Weighted Average Remaining Contractual Life (years), Options exercisable	1 year 7 months 6 days
Aggregate Intrinsic Value, Outstanding	$ 169	$ 135
Aggregate Intrinsic Value, Options exercisable	$ 169