Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Series D Preferred Stock [Member] Accumulated Deficit [Member]	Series D Preferred Stock [Member] Parent [Member]	Series D Preferred Stock [Member]	Series E Preferred Stock [Member] Accumulated Deficit [Member]	Series E Preferred Stock [Member] Parent [Member]	Series E Preferred Stock [Member]	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2016							$ 61,333	$ 8	$ 118,655	$ (112,024)	$ 67,972	$ 2,827	$ 70,799
Balance, shares at Dec. 31, 2016							6,245	763
Stock-based compensation									34		34		34
Stock-based compensation, shares								14
Long-term incentive plan												43	43
Issuance of common stock								$ 47	45,869		45,916		45,916
Issuance of common stock, shares								4,772
Issuance of common units												148	148
Dividends and distributions declared: Common stock (per share)										(2,253)	(2,253)		(2,253)
Dividends and distributions declared: Preferred stock	$ (650)	$ (650)	$ (650)	$ (50)	$ (50)	$ (50)
Fractional common shares settled in reverse stock split									(1)		(1)		(1)
Conversion of Series D Preferred to common stock and issuance of Series E Preferred							$ (61,333)	$ 60	61,273	(10,903)	(10,903)		(10,903)
Conversion of Series D Preferred to common stock and issuance of Series E Preferred, shares							(6,245)	6,005
Warrant exchange									289		289		289
Net earnings (loss)										(2,350)	(2,350)	(50)	(2,400)
Balance at Mar. 31, 2017								$ 115	226,119	(128,230)	98,004	2,968	100,972
Balance, shares at Mar. 31, 2017								11,554
Balance at Dec. 31, 2017							$ 10,050	$ 118	230,727	(130,489)	110,406	1,408	111,814
Balance, shares at Dec. 31, 2017							925	11,834
Stock-based compensation								$ 1	241		242		242
Stock-based compensation, shares								27
Issuance of common stock									103		103		103
Issuance of common stock, shares								12
Issuance of common units												50	50
Dividends and distributions declared: Common stock (per share)										(2,317)	(2,317)		(2,317)
Dividends and distributions declared: Preferred stock				$ (144)	$ (144)	$ (144)
Dividends and distributions declared: Common unit distribution declared ($0.00375 per unit)												(18)	(18)
Net earnings (loss)										786	786	6	792
Balance at Mar. 31, 2018							$ 10,050	$ 119	$ 231,071	$ (132,164)	$ 109,076	$ 1,446	$ 110,522
Balance, shares at Mar. 31, 2018							925	11,873