Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (51,903)	$ (86,975)
Other comprehensive loss:
Cumulative translation loss		(1)
Comprehensive loss	$ (51,903)	$ (86,976)