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Note 9 - Line of Credit (Details Textual) - USD ($)
$ in Thousands
Sep. 29, 2020
Sep. 25, 2020
Jan. 01, 2022
Jan. 02, 2021
Oct. 18, 2019
Long-term Line of Credit, Noncurrent     $ 14,151 $ 11,890  
Note Issued to Acquire Treasury Stock [Member]          
Repayments of Subordinated Debt, Total $ 2,200 $ 2,200      
Citizens Bank of Pennsylvania [Member] | Revolving Credit Facility [Member]          
Line of Credit Facility, Maximum Borrowing Capacity         $ 45,000
Debt Instrument, Interest Rate, Effective Percentage     2.00% 2.70%  
Long-term Line of Credit, Noncurrent     $ 14,200 $ 11,900  
Letters of Credit Outstanding, Amount     1,900 $ 1,900  
Line of Credit Facility, Remaining Borrowing Capacity     $ 28,900