Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (877)	$ 1,381
Other comprehensive income (loss) - foreign currency translation	348	(72)
Comprehensive (loss) income	(529)	1,309
Comprehensive loss attributable to noncontrolling interests	(88)	(219)
Comprehensive income attributable to preferred unitholder	1,033	1,033
Comprehensive (loss) income attributable to common unitholders	$ (1,474)	$ 495