QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Revenues	$ 26,641	$ 29,215	$ 36,856	$ 47,277	$ 50,025	$ 47,607	$ 51,544	$ 48,294	$ 139,989		$ 197,470		$ 236,059
Loss on early extinguishment of debt	0	0	4,911	25,071	808	0	0	0	29,982		808		8,215
Impairment of real estate	0	0	2,800	66,200					69,000		0		13,100
Gain on sale of real estate	0	302	55,221	377,581					433,104		0		408,098
Net income (loss)	(1,525)	2,856	52,567	291,623	(900)	(529)	1,949	622	345,521		1,142		379,758
Net income (loss) attributable to the Company	(1,538)	2,848	52,566	291,797	(906)	(528)	1,937	618	345,673		1,121		379,737
Redeemable preferred stock dividends declared or accumulated	(4,161)	(4,470)	(4,302)	(4,162)	(4,043)	(3,921)	(3,814)	(3,645)	(17,095)		(15,423)		(1,926)
Redeemable preferred stock redemptions (Note 10)	(5,874)	0	(4)	(4)					$ (5,882)
Redeemable preferred stock redemptions					1	1	1	1			$ 4		$ 2
Net income (loss) attributable to common stockholders	$ (11,573)	$ (1,622)	$ 48,260	$ 287,631	$ (4,948)	$ (4,448)	$ (1,876)	$ (3,026)
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS PER SHARE (1) (2):
Continuing operations (in usd per share)	$ (0.79)	$ (0.11)	$ 3.31	$ 19.70	$ (0.34)	$ (0.30)	$ (0.13)	$ (0.21)
Net income (in usd per share)	$ (0.79)	$ (0.11)	$ 3.20	$ 18.90	$ (0.34)	$ (0.30)	$ (0.13)	$ (0.21)
Weighted average shares of common stock outstanding - basic (in shares)	14,598	14,598	14,597	14,598	14,598	14,598	14,597	14,595
Weighted average shares of common stock outstanding - diluted (in shares)	14,599	14,599	15,284	15,245	14,598	14,598	14,597	14,595	16,493	[1]	14,597	[1]	23,023	[1]
Previously reported
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Revenues					$ 50,127	$ 47,640	$ 51,559	$ 48,398
Adjustment
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Revenues					$ (102)	$ (33)	$ (15)	$ (104)

[1] All share and per share amounts have been adjusted to give retroactive effect to the one-for-three reverse stock split of our common stock effected on September 3, 2019.