CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Noncontrolling Interest
Beginning Balance (in shares) at Dec. 31, 2017		1	42,969
Beginning Balance at Dec. 31, 2017	$ 16,090	$ 0	$ 43	$ 2,223,388	$ (6,272)	$ (2,195,346)	$ (5,723)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock, net of issuance costs (in shares)			23,000
Issuance of common stock, net of issuance costs	64,170		$ 23	64,147
Exchange of common stock for preferred stock (in shares)		12	(8,000)
Exchange of common stock for preferred stock	0		$ (8)	8
Value of beneficial conversion features related to preferred stock	0			80		(80)
Equity-based compensation	6,369			6,369
Noncontrolling interest	(32)						(32)
Other (in shares)			17
Other	33			33
Net loss for the year	(29,320)					(29,320)
Other comprehensive loss	(4,371)				(4,371)
Ending Balance (in shares) at Dec. 31, 2018		13	57,986
Ending Balance at Dec. 31, 2018	52,939	$ 0	$ 58	2,294,025	(10,643)	(2,224,746)	(5,755)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation	5,166			5,166
Noncontrolling interest	(3)						(3)
Other (in shares)			(6)
Other	2			2
Net loss for the year	(40,020)					(40,020)
Other comprehensive loss	(1,350)				(1,350)
Ending Balance (in shares) at Dec. 31, 2019		13	57,980
Ending Balance at Dec. 31, 2019	$ 17,930	$ 0	$ 58	$ 2,299,186	$ (11,993)	$ (2,263,563)	$ (5,758)