Summary of Significant Accounting Policies - Reconciliation of Changes in Deferred Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019
Reconciliation of the changes in the Company's deferred revenue balance
Balance, beginning of period	$ 1,810	$ 2,225
Additions to deferral	1,610	2,168
Revenue recognized	(2,190)	(2,564)
Deductions from reserves	(3)	(19)
Balance, end of period	$ 1,227	$ 1,810