Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Assets:
Accounts receivable, deferred rent	$ 2,600	$ 604,800
Aircraft and aircraft engines held for lease, accumulated depreciation	38,790,800	32,639,600
Liabilities:
Unamortized debt issuance costs	$ 1,826,000	$ 1,999,900
Stockholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, authorized (in shares)	2,000,000	2,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	10,000,000	10,000,000
Common stock, issued (in shares)	1,629,999	1,629,999
Common stock, outstanding (in shares)	1,416,699	1,566,699
Treasury stock (in shares)	213,300	63,300