Equity - Schedule of Changes in Stockholders' Equity (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Class of Stock [Line Items]
Beginning balance	$ 97,155	$ 95,669	$ 101,556	$ 95,793
Common stock issued under employee plans	193	44	1,436	994
Shares withheld for net share settlement of RSUs	(512)	(309)	(532)	(345)
Equity-based compensation expense	1,019	656	1,987	1,328
Net income (loss)	(6,126)	1,524	(12,630)	300
Other comprehensive income (loss)	19	71	(69)	(22)
Common stock repurchases	0	0	0	(393)
Ending balance	91,748	97,655	91,748	97,655
Common Stock and Additional Paid-in Capital
Class of Stock [Line Items]
Beginning balance	195,388	189,899	193,197	188,313
Common stock issued under employee plans	193	44	1,436	994
Shares withheld for net share settlement of RSUs	(512)	(309)	(532)	(345)
Equity-based compensation expense	1,019	656	1,987	1,328
Ending balance	196,088	190,290	196,088	190,290
Treasury Stock
Class of Stock [Line Items]
Beginning balance	(29,551)	(29,551)	29,551	(29,158)
Common stock repurchases				(393)
Ending balance	(29,551)	(29,551)	(29,551)	(29,551)
Accumulated Other Comprehensive Income
Class of Stock [Line Items]
Beginning balance	552	331	640	424
Other comprehensive income (loss)	19	71	(69)	(22)
Ending balance	571	402	571	402
Accumulated Deficit
Class of Stock [Line Items]
Beginning balance	(69,234)	(65,010)	(62,730)	(63,786)
Net income (loss)	(6,126)	1,524	(12,630)	300
Ending balance	$ (75,360)	$ (63,486)	$ (75,360)	$ (63,486)