QUARTERLY DATA (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Data Details
Property operating expenses	$ 320	$ 345	$ 352	$ 401	$ 385	$ 380	$ 363	$ 390	$ 958	$ 505	$ 477	$ 406	$ 61	$ 50	$ 87
Operating loss	(320)	(345)	(352)	(401)	(385)	(380)	(363)	(390)	(958)	(505)	(477)	(406)	1,418	1,518	2,346
Other income, net of other expenses	789	680	603	955	1,013	1,003	1,058	949	7,571	1,130	1,123	1,119
Income before gain on land sales, non-controlling interest, and taxes	469	680	603	554	628	623	695	559	6,613	625	646	713	2,306	2,505	8,597
Income tax expense	(807)				(946)				(3,057)			(6)	(807)	(946)	(3,063)
Net income (loss) from continuing operations	(338)	680	603	554	(318)	623	695	559	3,556	625	646	707	1,499	1,559	5,534
Net income (loss) from discontinued operations									(4)			(12)			(16)
Net income (loss)	$ (338)	$ 680	$ 603	$ 554	$ (318)	$ 623	$ 695	$ 559	$ 3,552	$ 625	$ 646	$ 695	$ 1,499	$ 1,559	$ 5,518
Earnings per share - basic
Net income (loss) from continuing operations - basic	$ (.08)	$ 0.16	$ 0.14	$ 0.13	$ (0.08)	$ 0.15	$ 0.17	$ 0.13	$ 0.86	$ 0.15	$ 0.15	$ 0.17	$ .36	$ 0.37	$ 1.33
Net income (loss) applicable to common shares - basic	$ (.08)	$ 0.16	$ 0.14	$ 0.13	$ (0.08)	$ 0.15	$ 0.17	$ 0.13	$ 0.86	$ 0.15	$ 0.15	$ 0.17	$ .36	$ 0.37	$ 1.33
Weighted average common shares used in computing earnings per share (in shares)	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214
Earnings per share - diluted
Net income (loss) from continuing operations - diluted	$ (.08)	$ 0.16	$ 0.14	$ 0.13	$ (0.08)	$ 0.15	$ 0.17	$ 0.13	$ 0.86	$ 0.15	$ 0.15	$ 0.17	$ 0.36	$ 0.37	$ 1.33
Net income (loss) applicable to common shares- diluted	$ (.08)	$ 0.16	$ 0.14	$ 0.13	$ (0.08)	$ 0.15	$ 0.17	$ 0.13	$ 0.86	$ 0.15	$ 0.15	$ 0.17	$ 0.36	$ 0.37	$ 1.33
Weighted average common shares used in computing diluted earnings per share (in shares)	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214	4,168,214