CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (6,864)	$ (2,805)	$ (17,902)	$ (4,891)
Other comprehensive loss:
Foreign currency translation gain (loss)	0	27	0	(25)
Reclassification adjustment for amounts recognized in net loss	0	(64)	0	(64)
Total other comprehensive loss	0	(37)	0	(89)
Total comprehensive loss	(6,864)	(2,842)	(17,902)	(4,980)
Total comprehensive loss attributable to noncontrolling interests	523	220	1,091	771
Total comprehensive loss attributable to common stockholders	$ (6,341)	$ (2,622)	$ (16,811)	$ (4,209)