CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (9,086)	$ (26,599)	$ (3,298)
Other comprehensive (loss) income:
Foreign currency translation (loss) gain	(25)	(113)	313
Reclassification adjustment for amounts recognized in net loss	(64)	0	0
Total other comprehensive (loss) income	(89)	(113)	313
Total comprehensive loss	(9,175)	(26,712)	(2,985)
Total comprehensive loss attributable to noncontrolling interests	1,587	3,091	26
Total comprehensive loss attributable to common stockholders	$ (7,588)	$ (23,621)	$ (2,959)