CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2018		14,015,615
Beginning balance at Dec. 31, 2018	$ 7,824	$ 140	$ 952,626	$ (926,092)	$ (20,442)	$ 1,592
Comprehensive income (loss):
Net loss	(21,248)			(21,360)		112
Translation adjustments	931				970	(39)
Stock-based compensation expense	1,293		1,293
Exercise of stock options (in shares)		5,750
Exercise of stock options	18		18
Vesting of restricted stock units/awards (in shares)		68,199
Vesting of restricted stock units/awards	0	$ 1	(1)
Vested restricted stock cancelled for employee minimum income taxes (in shares)		(20,044)
Vested restricted stock cancelled for employee minimum income taxes	(257)		(257)
Ending balance (in shares) at Mar. 31, 2019		14,069,520.00
Ending balance at Mar. 31, 2019	(11,439)	$ 141	953,679	(947,452)	(19,472)	1,665
Beginning balance (in shares) at Dec. 31, 2019		14,224,787
Beginning balance at Dec. 31, 2019	(34,632)	$ 142	956,647	(974,291)	(19,318)	2,188
Comprehensive income (loss):
Net loss	(2,340)			(2,263)		(77)
Translation adjustments	(2,238)				(1,781)	(457)
Stock-based compensation expense	617		617
Vesting of restricted stock units/awards (in shares)		16,089
Vesting of restricted stock units/awards	0	$ 0	0
Vested restricted stock cancelled for employee minimum income taxes (in shares)		(750)
Vested restricted stock cancelled for employee minimum income taxes	(10)		(10)
Ending balance (in shares) at Mar. 31, 2020		14,240,126
Ending balance at Mar. 31, 2020	$ (38,603)	$ 142	$ 957,254	$ (976,554)	$ (21,099)	$ 1,654