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Financial Statement Presentation (Details Textual)
1 Months Ended 6 Months Ended
Apr. 30, 2020
USD ($)
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Mar. 31, 2020
USD ($)
New Accounting Pronouncements or Change in Accounting Principle        
Minimum debt service coverage ratio   1.25    
Minimum net worth required for compliance   $ 15,000,000    
Long-term debt, gross   90,866,000   $ 86,174,000
AIRT Small Business Administration S B A C A R E S Act Paycheck Protection Program        
New Accounting Pronouncements or Change in Accounting Principle        
Payments for (proceeds from) loans and leases $ 8,200,000      
Contrail Aviation Inc. | Revolving Credit Facility        
New Accounting Pronouncements or Change in Accounting Principle        
Long-term debt, gross   $ 1,600,000    
Forecast        
New Accounting Pronouncements or Change in Accounting Principle        
Debt instrument amount     $ 43,600,000