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Note 7 - Debt - Revolving Credit Facility (Details)
$ in Millions
12 Months Ended
Feb. 15, 2023
USD ($)
Dec. 31, 2024
USD ($)
Nov. 21, 2024
USD ($)
Nov. 20, 2024
USD ($)
May 03, 2024
USD ($)
Debt          
Additional amount to be maintained in a separate dedicated account   $ 1.0      
Unsecured Debt          
Debt          
Amount of permitted additional unsecured debt     $ 75.0 $ 45.0  
Revolving loans under the new facility          
Debt          
Fixed charge coverage ratio   1.1      
Average daily cash balance   $ 5.0      
Additional amount to be maintained in a separate dedicated account   1.5      
Revolving Credit Facility          
Debt          
Initial aggregate revolving commitment $ 125.0       $ 200.0
Initial aggregate revolving commitment   $ 104.8      
Additional revolving commitment (Accordion feature) $ 50.0       $ 75.0
Revolving Credit Facility | Secured Overnight Financing Rate (SOFR)          
Debt          
Interest rate, basis spread 2.50%        
Revolving Credit Facility | Base Rate          
Debt          
Interest rate, basis spread 2.00%        
Revolving Credit Facility | Base Rate | Minimum          
Debt          
Interest rate, basis spread 0.50%        
Revolving Credit Facility | Base Rate | Maximum          
Debt          
Debt instrument, interest rate during period 3.00%