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Note 11 - Revolving Credit Agreement (Details Textual) - Revolving Credit Facility [Member] - USD ($)
$ in Thousands
12 Months Ended
Nov. 12, 2021
Apr. 08, 2020
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Line of Credit Facility, Current Borrowing Capacity $ 75,000        
Line of Credit Facility, Additional Borrowing Capacity 75,000        
Line of Credit Facility, Maximum Borrowing Capacity $ 150,000        
Debt Instrument, Term (Year) 5 years        
Long-Term Line of Credit, Total     $ 0 $ 0  
Proceeds from Long-term Lines of Credit   $ 50,000      
Debt Instrument, Interest Rate, Stated Percentage   2.08%      
Interest Expense, Debt, Total     $ 0 $ 0 $ 800
Minimum [Member]          
Debt Instrument, Basis Spread on Variable Rate 0.25%        
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.20%        
Maximum [Member]          
Debt Instrument, Basis Spread on Variable Rate 1.00%        
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.30%