Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Assets:
Finance lease receivable, allowance for doubtful accounts	$ 2,324,000	$ 1,503,000
Aircraft and aircraft engines held for lease, accumulated depreciation	21,699,000	21,001,300
Accumulated depreciation	12,300	16,400
Accumulated amortization, office lease right of use	43,900	27,400
Liabilities:
Unamortized debt issuance costs	0	780,900
Unamortized debt issuance costs	$ 0	$ 313,400
Stockholders' Deficit:
Preferred stock, par value	$ .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	$ .001	$ 0.001
Common stock, authorized	10,000,000	10,000,000
Common stock, outstanding	1,545,884	1,545,884
Treasury stock	213,332	213,332