Finance Leases Receivable (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) Aircraft Lease	Dec. 31, 2017 USD ($)
Finance Leases Receivable [Abstract]
Number of aircraft with sales type finance leases | Lease	6
Number of aircraft sold | Aircraft	3
Cash proceeds from sale of aircraft	$ 1,088,700
Proceeds from sale of aircraft from maintenance reserves on one purchased aircraft	1,675,100
Proceeds from sale of aircraft from maintenance reserves from two leased aircraft	2,618,100
Net Investment Included in Finance Leases and Direct Financing Leases Receivable [Abstract]
Gross minimum lease payments receivable	17,107,100	$ 27,074,400
Less unearned interest	(1,856,200)	(3,513,400)
Finance leases receivable	15,250,900	$ 23,561,000
Minimum Future Payments Receivable under Finance Leases [Abstract]
2019	4,885,500
2020	4,208,600
2021	4,805,000
2022	3,208,000
Total	$ 17,107,100