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Aircraft Lease Assets (Details 4)
3 Months Ended
Mar. 31, 2020
USD ($)
Aircraft Lease Assets [Abstract]  
Roll forward of finance lease receivable allowance for doubtful accounts, beginning $ 2,908,600
Deductions upon sale of assets (735,200)
Deductions upon lease amendments (2,173,400)
Additions charged to expense 1,170,000
Roll forward of finance lease receivable allowance for doubtful accounts, ending $ 1,170,000