Note 5 - Debt Obligations (Details Textual) - Heritage Bank of Commerce [Member] - Revolving Credit Facility [Member] - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
Oct. 01, 2023	Oct. 02, 2022	Oct. 01, 2023	Oct. 02, 2022	Jan. 01, 2023
Line of Credit Facility, Maximum Month-end Outstanding Amount					$ 15,000,000
Debt Instrument, Interest Rate, Effective Percentage	9.00%		9.00%		8.00%
Interest Expense, Debt	$ 30	$ 20	$ 92	$ 59

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

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