Organization and Summary of Significant Accounting Policies (Details)		3 Months Ended		9 Months Ended
	Aug. 31, 2016 Subsidiary	Sep. 30, 2016 USD ($) Aircraft	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) Aircraft	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Organization and Summary of Significant Accounting Policies [Abstract]
Number of wholly owned subsidiaries | Subsidiary	2
Capital Leased Assets [Line Items]
Impairment charge		$ 0	$ 0	$ 321,200	$ 147,500
Notes payable and accrued interest		126,613,400		$ 126,613,400		$ 107,621,600
Finance Leases [Abstract]
Number of aircraft with finance leases that contain lessee purchase options | Aircraft				5
Interest earned on finance lease		199,800	184,000	$ 571,900	275,400
Credit Facility [Member]
Capital Leased Assets [Line Items]
Notes payable and accrued interest		110,180,000		110,180,000		110,435,600
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		1,547,900		1,547,900		1,946,600
Liabilities recorded at fair value		0		0		$ 0
Aircraft [Member] | Held for Lease [Member]
Capital Leased Assets [Line Items]
Impairment charge		0	0		$ 147,500
Aircraft [Member] | Held for Sale [Member]
Capital Leased Assets [Line Items]
Impairment charge		$ 0	$ 0	$ 321,200
Number of aircraft held for sale | Aircraft		3		3