Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Credit Agreement (Details Textual)

v3.21.2
Note 10 - Credit Agreement (Details Textual) - The Facility [Member] - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Dec. 21, 2018
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2020
Sep. 30, 2021
Jun. 30, 2021
Revolving Credit Facility [Member]              
Line of Credit Facility, Maximum Borrowing Capacity $ 165,000            
Debt Issuance Costs, Net, Total 600            
Proceeds from Long-term Lines of Credit       $ 100,000      
Repayments of Long-term Lines of Credit   $ 50,000 $ 50,000        
Long-term Line of Credit, Total           $ 0 $ 0
Interest Expense, Debt, Total         $ 300    
Line of Credit Facility, Remaining Borrowing Capacity           89,600 75,700
Debt Covenant, Fixed Charge Coverage Ratio, Maximum Unused Availability $ 18,500            
Debt Instrument, Covenant, Minimum Fixed Charge Coverage Ratio 1,000,000.0            
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]              
Debt Instrument, Basis Spread on Variable Rate 1.00%            
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]              
Debt Instrument, Basis Spread on Variable Rate 1.50%            
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]              
Debt Instrument, Basis Spread on Variable Rate 2.00%            
Revolving Credit Facility [Member] | Fed Funds Effective Rate Overnight Index Swap Rate [Member]              
Debt Instrument, Basis Spread on Variable Rate 0.50%            
Revolving Credit Facility [Member] | Additional Margin on Variable Rate Option [Member] | Minimum [Member]              
Debt Instrument, Basis Spread on Variable Rate 0.50%            
Revolving Credit Facility [Member] | Additional Margin on Variable Rate Option [Member] | Maximum [Member]              
Debt Instrument, Basis Spread on Variable Rate 1.00%            
Standby Letters of Credit [Member]              
Letters of Credit Outstanding, Amount           $ 4,000 $ 5,000