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Note 9 - Line of Credit (Details Textual) - USD ($)
$ in Thousands
Sep. 29, 2020
Apr. 03, 2021
Jan. 02, 2021
Mar. 28, 2020
Oct. 18, 2019
Long-term Line of Credit, Noncurrent   $ 22,029 $ 11,890    
Note Issued to Acquire Treasury Stock [Member]          
Repayments of Subordinated Debt, Total $ 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   2.40%   3.70%  
Long-term Line of Credit, Noncurrent   $ 22,000 11,900    
Letters of Credit Outstanding, Amount   1,900 1,900    
Line of Credit Facility, Remaining Borrowing Capacity   $ 21,100 $ 31,200