Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Accounts receivable, deferred rent	$ 0	$ 828,000
Finance lease receivable, allowance for doubtful accounts	1,503,000	2,908,600
Aircraft and aircraft engines held for lease, accumulated depreciation	21,001,300	31,338,700
Accumulated depreciation	16,400	9,600
Accumulated amortization, lease right of use	27,400	524,500
Accumulated amortization, favorable lease acquired		0
Liabilities:
Unamortized debt issuance costs	780,900	3,825,700
Notes payable and accrued interest held for sale, unamortized debt issuance costs	$ 313,400	$ 0
Stockholders' equity:
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, authorized	2,000,000	2,000,000
Preferred stock, issued	0	0
Preferred stock, outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, authorized	10,000,000	10,000,000
Common stock, issued	1,545,884	1,545,884
Common stock, outstanding	1,545,884	1,545,884
Treasury stock	213,332	213,332