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Note 6 - Debt Obligations (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Jan. 01, 2023
Jan. 02, 2022
May 06, 2020
Line of Credit, Current $ 15,000 $ 15,000  
Heritage Bank of Commerce [Member] | Paycheck Protection Program [Member]      
Debt Instrument, Face Amount     $ 1,200
Debt Instrument, Interest Rate, Stated Percentage     1.00%
Heritage Bank of Commerce [Member] | Revolving Credit Facility [Member]      
Line of Credit Facility, Maximum Month-end Outstanding Amount 15,000    
Debt Instrument, Fee Amount 45    
Line of Credit, Current $ 15,000 $ 15,000  
Debt Instrument, Interest Rate, Effective Percentage 8.00% 3.75%  
Heritage Bank of Commerce [Member] | Revolving Credit Facility [Member] | Prime Rate [Member]      
Debt Instrument, Basis Spread on Variable Rate 0.50%