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Financing Arrangements - Narrative (Details) - Unsecured Debt - USD ($)
3 Months Ended
Jun. 23, 2023
May 26, 2023
Jun. 30, 2023
Dec. 01, 2023
Term Loan G - ONB | Contrail Debt        
Debt Instrument        
Principle amount   $ 38,200,000    
Term Loan G - ONB | Contrail Debt | 1 Month SOFR        
Debt Instrument        
Basis spread on variable rate (as a percentage)   3.11% 3.11%  
Revolver - ONB | Contrail Debt        
Debt Instrument        
Principle amount   $ 25,000,000    
Revolver - ONB | Contrail Debt | 1 Month SOFR        
Debt Instrument        
Basis spread on variable rate (as a percentage)   3.56% 3.56%  
Term Loan - PSB | AirCo 1 Debt        
Debt Instrument        
Principle amount   $ 6,400,000    
Term Loan - PSB | AirCo 1 Debt | 3 Month SOFR        
Debt Instrument        
Basis spread on variable rate (as a percentage)   3.26% 3.26%  
Revolver - MBT        
Debt Instrument        
Line of credit facility, maximum seasonal increase amount $ 2,000,000      
Credit facility maximum borrowing capacity 19,000,000      
Revolver - MBT | Other Investments        
Debt Instrument        
Debt instrument, covenant investment in other investments $ 5,000,000      
Revolver - MBT | Minimum        
Debt Instrument        
Commitment fee (as a percentage) 0.11%      
Revolver - MBT | Maximum        
Debt Instrument        
Commitment fee (as a percentage) 0.15%      
Revolver - MBT | Forecast        
Debt Instrument        
Credit facility maximum borrowing capacity       $ 17,000,000
Revolver - MBT | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Minimum        
Debt Instrument        
Basis spread on variable rate (as a percentage) 2.25%      
Revolver - MBT | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Maximum        
Debt Instrument        
Basis spread on variable rate (as a percentage) 3.25%