Finance Leases Receivable (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($) Aircraft	Sep. 30, 2015 USD ($) Aircraft	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2016 Aircraft	Dec. 31, 2015 USD ($)
Loans And Leases Receivable Disclosure [Line Items]
Net gain on sales-type finance leases	$ 1,166,100	$ 1,095,400	$ 1,213,600	$ 5,179,200
Net Investment [Abstract]
Gross minimum lease payments receivable	21,952,600		21,952,600			$ 14,074,500
Less unearned interest	(3,664,300)		(3,664,300)			(2,178,900)
Finance leases receivable	18,288,300		18,288,300			11,895,600
Minimum Future Lease Revenue Payments [Abstract]
Remainder of 2016	842,900		842,900
2017	3,740,100		3,740,100
2018	3,663,600		3,663,600
2019	4,939,600		4,939,600
2020	2,727,600		2,727,600
Thereafter	6,038,800		6,038,800
Total	$ 21,952,600		$ 21,952,600			$ 14,074,500
Turboprop Aircraft [Member] | Operating Lease [Member]
Loans And Leases Receivable Disclosure [Line Items]
Number of assets lease extended | Aircraft		2
Turboprop Aircraft [Member] | Financing lease [member]
Loans And Leases Receivable Disclosure [Line Items]
Number of aircraft leased | Aircraft	2	2
Number of aircraft off lease | Aircraft					1
Number of aircraft returned | Aircraft	1
Net gain on sales-type finance leases	$ 1,166,100	$ 179,000
Additional gain on finance lease		$ 916,400