Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Condensed Consolidated Statements of Cash Flows (Unaudited) [Abstract]
Net cash provided by operating activities	$ 11,191,500	$ 8,706,500
Investing activities:
Proceeds from sale of aircraft and aircraft engines held for lease, net of re-sale fees	3,186,800	1,397,300
Proceeds from sale of assets held for sale, net of re-sale fees	2,644,900	112,600
Investment in direct financing leases	0	(7,614,200)
Investment in aircraft parts and acquisition costs	(22,606,000)	(21,735,900)
Net cash used in investing activities	(16,774,300)	(27,840,200)
Financing activities:
Issuance of notes payable - Credit Facility	21,000,000	26,000,000
Repayment of notes payable - Credit Facility	(17,500,000)	(2,800,000)
Repayment of notes payable - special purpose financing	(2,127,000)	(2,033,900)
Debt issuance costs	(70,000)	(65,000)
Net cash provided by financing activities	1,303,000	21,101,100
Net (decrease)/increase in cash and cash equivalents	(4,279,800)	1,967,400
Cash and cash equivalents, beginning of period	8,657,800	2,194,400
Cash and cash equivalents, end of period	$ 4,378,000	$ 4,161,800