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Note 7 - Financing Agreements (Details Textual)
$ in Thousands
Mar. 11, 2021
May 01, 2021
USD ($)
Aug. 28, 2020
USD ($)
Letter of Credit [Member]      
Line of Credit Facility, Expiration Period (Year) 7 years    
Line of Credit [Member]      
Line of Credit Facility, Maximum Borrowing Capacity     $ 35,000
Debt Instrument, Covenant, Maximum Interest-bearing Debt to EBITDA Ratio     2.5
Long-term Line of Credit, Total   $ 0  
Line of Credit Facility, Remaining Borrowing Capacity   31,189  
Standby Letters of Credit [Member]      
Line of Credit Facility, Maximum Borrowing Capacity     $ 20,000
Long-term Line of Credit, Total   3,811  
Guarantees [Member]      
Long-term Line of Credit, Total   $ 2,561