Net Loss Per Share - Computation of Net Loss Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net loss	$ (26,938)	$ (45,189)	$ (55,009)	$ (78,344)
Denominator:
Weighted average common shares outstanding - basic (in shares)	145,544,372	100,040,083	138,279,945	98,617,564
Weighted average common shares outstanding - diluted (in shares)	145,544,372	100,040,083	138,279,945	98,617,564
Net loss per share - basic (in dollars per share)	$ (0.19)	$ (0.45)	$ (0.40)	$ (0.79)
Net loss per share - diluted (in dollars per share)	$ (0.19)	$ (0.45)	$ (0.40)	$ (0.79)