Net Loss per Share - Basic and diluted net loss per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Numerator:
Net loss	$ (14,346)	$ (13,859)	$ (20,437)	$ (18,973)	$ (28,205)	$ (39,410)	$ (77,300)
Net loss attributable to common stockholders	$ (14,346)		$ (20,437)		$ (28,205)	$ (39,410)
Denominator:
Weighted average common stock outstanding-basic (in shares)	32,399,257		31,571,704		32,380,128	31,529,939
Weighted average common stock outstanding-diluted (in shares)	32,399,257		31,571,704		32,380,128	31,529,939
Net loss per share attributable to common stockholders-basic (in dollars per share)	$ (0.44)		$ (0.65)		$ (0.87)	$ (1.25)
Net loss per share attributable to common stockholders-diluted (in dollars per share)	$ (0.44)		$ (0.65)		$ (0.87)	$ (1.25)