Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss attributable to common stockholders	$ (80,026)	$ (77,620)	$ (69,703)
Change in unrealized gain on marketable securities	0	0	54
Foreign currency translation losses	(1)	0	0
Comprehensive loss	$ (80,027)	$ (77,620)	$ (69,649)