Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Condensed Consolidated Statements of Cash Flows (Unaudited) [Abstract]
Net cash provided by operating activities	$ 4,552,000	$ 4,258,100
Investing activities:
Proceeds from sale of aircraft and aircraft engines held for lease, net of re-sale fees	3,195,000	570,100
Proceeds from sale of assets held for sale, net of re-sale fees	1,683,500	16,200
Investment in direct financing leases	0	(7,354,100)
Investment in aircraft parts and acquisition costs	(1,236,000)	(62,800)
Net cash provided by/(used in) investing activities	3,642,500	(6,830,600)
Financing activities:
Issuance of notes payable - Credit Facility	0	7,000,000
Repayment of notes payable - Credit Facility	(11,000,000)	(2,800,000)
Repayment of notes payable - special purpose financing	(1,059,200)	(1,013,300)
Net cash (used in)/provided by financing activities	(12,059,200)	3,186,700
Net (decrease)/increase in cash and cash equivalents	(3,864,700)	614,200
Cash and cash equivalents, beginning of year	8,657,800	2,194,400
Cash and cash equivalents, end of year	$ 4,793,100	$ 2,808,600