Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
ASSETS:
Cash	$ 49,396	$ 49,396	$ (39)
Investments:
Marketable securities	892,668	892,668	1,034,868
Non-marketable securities	4,960,344	4,960,344	2,574,665
Total assets	5,902,408	5,902,408	3,609,494
LIABILITIES AND STOCKHOLDERS' EQUITY:
Accounts payable and accrued expenses	33,998	33,998	151,121
Line of credit borrowings	350,000	350,000	350,000
Note payable	2,272,237	2,272,237	2,109,857
Note payable - related party	624,313	624,313	317,625
Interest payable - related party	170,216	170,216	139,292
Total liabilities	3,450,764	3,450,764	3,067,895
Stockholders' equity
Preferred stock, $0.01 par value, 5,000,000 shares authorized, no shares issued and outstanding	0	0	0
Common stock, $0.01 par value, 25,000,000 shares authorized, of which 2,937,225 shares are issued and outstanding as of September 30, 2021 and December 31, 2020	29,372	29,372	29,372
Additional paid-in capital	21,839,083	21,839,083	21,839,083
Additional paid-in capital - stock options	104,809	104,809	0
Accumulated deficit	(22,476,131)	(22,476,131)	(23,204,026)
Accumulated other comprehensive Income	1,762,930	1,762,930	1,762,930
Net income	1,610,954	1,714,155	636,814
Stockholders' Equity before Treasury Stock	2,974,218	2,974,218	1,064,173
Less: Treasury Stock, 745,536 shares, at cost	(522,574)	(522,574)	(522,574)
Total stockholders' equity	2,451,644	2,451,644	541,599
Total liabilities and stockholders' equity	$ 5,902,408	$ 5,902,408	$ 3,609,494