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Recent Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 30, 2017	Sep. 30, 2017	Jul. 02, 2017	Apr. 02, 2017	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues related	$ 134,100	$ 126,876	$ 137,384	$ 112,721	$ 109,504	$ 129,807	$ 119,033	$ 100,206	$ 511,081	$ 458,550	$ 389,810
ASU 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of ASU 2016-09 stock compensation					69					69
ASU 2016-09 [Member] \| Accumulated Deficit [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of ASU 2016-09 stock compensation					(109)					(109)
Excess tax benefits that had not yet been recognized					264					264
ASU 2016-09 [Member] \| Additional Paid-in Capital [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of ASU 2016-09 stock compensation					$ 178					$ 178
Adoption of Accounting Standards Update 2014-09 [Member] \| Minimum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of ASU 2016-09 stock compensation	1,300								1,300
Revenues related									6,700
Adoption of Accounting Standards Update 2014-09 [Member] \| Maximum [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of ASU 2016-09 stock compensation	$ 1,700								1,700
Revenues related									$ 8,700