CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Undistributed Gains from Sales of Properties Net of Losses [Member]	Undistributed Losses from Operations [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2018	$ 21,033,055	$ 1,046,393	$ 24,157,986	$ 54,642,765	$ (58,473,808)	$ (340,281)
Balance (in shares) at Dec. 31, 2018		1,046,393				33,101
Net income	269,870				269,870
Dividend payable - $.50 per share	(506,646)			(506,646)
Retired 33,101 treasury shares	340,281	$ (33,101)	(307,180)			$ 340,281
Retired 33,101 treasury shares (in shares)		(33,101)				(33,101)
Non-employee stock option compensation	8,880		8,880
Balance at Dec. 31, 2019	$ 20,805,159	$ 1,013,292	23,859,686	54,136,119	(58,203,938)	$ 0
Balance (in shares) at Dec. 31, 2019	1,013,292	1,013,292				0
Net income	$ (1,052,114)				(1,052,114)
Dividend payable - $.50 per share	(503,624)			(503,624)
Purchased 6,044 treasury shares	$ (66,392)					$ (66,392)
Purchased 6,044 treasury shares , shares	6,044					6,044
Retired 33,101 treasury shares	$ 0
Balance at Dec. 31, 2020	$ 19,183,029	$ 1,013,292	$ 23,859,686	$ 53,632,495	$ (59,256,052)	$ (66,392)
Balance (in shares) at Dec. 31, 2020	1,007,248	1,013,292				6,044