Note 5 - Debt Obligations (Details Textual) - Heritage Bank of Commerce [Member] - Revolving Credit Facility [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jul. 02, 2023	Jul. 03, 2022	Jul. 02, 2023	Jul. 03, 2022	Jan. 01, 2023
Line of Credit Facility, Maximum Month-end Outstanding Amount					$ 15,000
Debt Instrument, Interest Rate, Effective Percentage	8.75%		8.75%		8.00%
Interest Expense, Debt	$ 29	$ 14	$ 62	$ 39

Amount of the cost of borrowed funds accounted for as interest expense for debt.

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