Condensed Consolidated Statements of Shareholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Total	Series A	Series B	Preferred Shares of Beneficial Interest Series A	Preferred Shares of Beneficial Interest Series A Series A	Common Shares of Beneficial Interest	Paid-in Capital	Paid-in Capital Series A	Accumulated Deficit and Distributions in Excess of Net Earnings	Accumulated Deficit and Distributions in Excess of Net Earnings Series A	Accumulated Deficit and Distributions in Excess of Net Earnings Series B	Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 4,384
Other comprehensive loss	3,616
Ending balance at Mar. 31, 2017												$ (6,928)
Beginning balance (in shares) at Dec. 31, 2017				125		69,370,609
Beginning balance at Dec. 31, 2017	(186,924)			$ 0		$ 694	$ 394,082		$ (581,470)			(230)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(8,639)								(8,639)
Other comprehensive loss	(938)											(938)
Redemption and distributions on preferred shares of beneficial interest – Series A		$ (134)						$ (133)		$ (1)
Redemption of and distribution on preferred shares of beneficial interest – Series A (in shares)					(125)
Distributions on preferred shares of beneficial interest – Series B			$ (1,817)								$ (1,817)
Distributions on common shares	(21,436)								(21,436)
Stock-based compensation expense, net of exercise (Stock Options and Restricted Stock Units)	1,580					$ 1	1,579
Stock-based compensation expense (Stock Options and Restricted Stock Units, net of exercise) (in shares)						125,763
Stock-based compensation expense (modification of Restricted Stock Units)	2,600						2,600
Warrants exercise	0					$ 64	(64)
Warrants exercise (in shares)						6,426,818
Issuance of common shares	484,905					$ 334	484,571
Issuance of common stock (in shares)						33,350,000
Conversion of mezzanine Series B Preferred shares	372,791					$ 332	372,459
Conversion of mezzanine Series B Preferred shares (in shares)						33,240,258
Ending balance at Mar. 31, 2018	$ 641,988			$ 0		$ 1,425	$ 1,255,094		$ (613,363)			$ (1,168)
Ending balance (in shares) at Mar. 31, 2018				0		142,513,448