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, 2016	$ 20,174,190	$ 1,035,493	$ 24,076,991	$ 52,208,754	$ (56,806,767)	$ (340,281)
Balance (in shares) at Dec. 31, 2016		1,035,493				33,101
Net loss	$ (314,224)				(314,224)
Stock options exercised, net of 1,600 re-load shares (in shares)	0
Balance at Dec. 31, 2017	$ 19,859,966	$ 1,035,493	24,076,991	52,208,754	(57,120,991)	$ (340,281)
Balance (in shares) at Dec. 31, 2017		1,035,493				33,101
Net loss	4,121,070			5,473,887	(1,352,817)
Dividend paid - $2.50 per share	(2,533,230)			(2,533,230)
Dividend payable - $.50 per share	(506,646)			(506,646)
Stock options exercised, net of 1,600 re-load shares	$ 91,895	$ 10,900	80,995
Stock options exercised, net of 1,600 re-load shares (in shares)	12,500	10,900
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