Balance Sheets (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Assets:
Accounts receivable, deferred rent	$ 924,100	$ 985,300
Accounts receivable, allowance for doubtful accounts	2,419,400	2,419,400
Aircraft and aircraft engines held for lease, accumulated depreciation	$ 51,135,100	$ 52,244,500
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)	1,606,557	1,606,557
Common stock, outstanding (in shares)	1,606,557	1,606,557
Treasury stock (in shares)	63,300	63,300