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Note 5 - Debt Obligations (Details Textual) - Heritage Bank of Commerce [Member] - Revolving Credit Facility [Member] - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Apr. 02, 2023
Apr. 03, 2022
Jan. 01, 2023
Line of Credit Facility, Maximum Month-end Outstanding Amount     $ 15,000
Debt Instrument, Interest Rate, Effective Percentage 8.50%   8.00%
Interest Expense, Debt $ 33 $ 24