Summary of Significant Accounting Policies - Changes in Accumulated Other Comprehensive Income by Component (Detail) - USD ($) $ in Thousands		12 Months Ended
	Jan. 02, 2021	Jan. 01, 2022	Jan. 02, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		$ 101,556	$ 95,793
Other comprehensive income (loss) before reclassification	$ 216	(62)
Other comprehensive income (loss), net of tax	216	(62)	216
Ending balance	101,556	134,015	101,556
Foreign currency
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	381	602
Other comprehensive income (loss) before reclassification	221	6
Other comprehensive income (loss), net of tax	221	6
Ending balance	602	608	602
Unrealized holding gains (losses) on available- for-sale investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	43	38
Other comprehensive income (loss) before reclassification	(5)	(68)
Other comprehensive income (loss), net of tax	(5)	(68)
Ending balance	38	(30)	38
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	424	640	424
Ending balance	$ 640	$ 578	$ 640