Organization and Summary of Significant Accounting Policies (Details)		3 Months Ended		6 Months Ended
	Aug. 31, 2016 Subsidiary	Jun. 30, 2017 USD ($) Aircraft	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) Aircraft	Jun. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Organization and Summary of Significant Accounting Policies [Abstract]
Number of wholly owned subsidiaries | Subsidiary	2
Capital Leased Assets [Line Items]
Impairment charge		$ 454,300	$ 246,200	$ 454,300	$ 321,200
Notes payable and accrued interest		147,433,700		$ 147,433,700		$ 125,837,900
Finance Leases [Abstract]
Number of aircraft with sales type finance leases | Aircraft				6
Number of aircraft with direct financing leases | Aircraft				3
Interest earned on finance lease		432,300	187,000	$ 757,700	372,100
SPE Financing [Member]
Capital Leased Assets [Line Items]
Notes payable and accrued interest		15,614,700		15,614,700		17,654,200
Credit Facility [Member]
Capital Leased Assets [Line Items]
Notes payable and accrued interest		133,453,200		133,453,200		110,183,600
Held for Sale [Member]
Capital Leased Assets [Line Items]
Impairment charge		70,400	41,100
Recurring [Member]
Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis [Abstract]
Money market funds included in cash and cash equivalents		2,848,700		2,848,700		1,348,100
Liabilities recorded at fair value		0		$ 0		$ 0
Aircraft [Member] | Held for Lease [Member]
Capital Leased Assets [Line Items]
Impairment charge		$ 454,300
Number of aircraft held for sale | Aircraft		1		1
Aircraft [Member] | Held for Sale [Member]
Capital Leased Assets [Line Items]
Impairment charge		$ 0	$ 246,200	$ 0	$ 321,200