Accrued Expenses and Other Current Liabilities - Components of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 28, 2024	Dec. 30, 2023
Components of accrued expenses and other current liabilities
Legal and professional fees	$ 156	$ 227
Sales and marketing expenses	17	117
Temporary help and consulting	49	140
Royalties payable	57	149
Tax payable	150	100
Other accrued expenses	48	1,263
Total accrued expenses	477	1,996
Customer deposits	1,312	925
Accrued warranty	500	308
Total other current liabilities	$ 1,812	$ 1,233