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Summary of Significant Accounting Policies - Reconciliation of Changes in Warranty Liability (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 01, 2022
Jan. 02, 2021
Reconciliation of the changes in the Company's warranty liability    
Balance, beginning of period $ 247 $ 536
Accruals for product warranties 105 128
Cost of warranty claims (158) (108)
Adjustment to pre-existing warranties (36) (309)
Balance, end of period $ 158 $ 247