Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator [Abstract]
Net loss attributable to common stockholders	$ (57,756)	$ (50,118)	$ (155,140)	$ (124,822)
Denominator [Abstract]
Weighted-average common shares outstanding - basic (in shares)	66,215,535	63,825,429	65,406,844	62,828,601
Weighted-average common shares outstanding - diluted (in shares)	66,215,535	63,825,429	65,406,844	62,828,601
Net loss per share attributable to common stockholders - basic (in dollars per share)	$ (0.87)	$ (0.79)	$ (2.37)	$ (1.99)
Net loss per share attributable to common stockholders - diluted (in dollars per share)	$ (0.87)	$ (0.79)	$ (2.37)	$ (1.99)
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Shares issuable upon conversion of 2021 Convertible Notes (in shares)	0	160,536	0	160,536
Warrants exercisable for common shares (in shares)	1,218,038	610,437	1,218,038	610,437
Restricted stock units convertible for common shares (in shares)	895,869	23,500	895,869	23,500
Options to purchase common shares (in shares)	12,730,994	11,040,697	12,730,994	11,040,697
Weighted average number diluted shares outstanding (in shares)	14,844,901	11,835,170	14,844,901	11,835,170