Net loss per share attributable to common stockholders - Company’s Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net loss	$ (28,680)	$ (29,494)	$ (41,198)	$ (10,962)	$ (58,174)	$ (52,160)
Cumulative undeclared preferred stock dividends	0		(1,047)		0	(2,042)
Net loss applicable to common stockholders basic	(28,680)		(42,245)		(58,174)	(54,202)
Net loss applicable to common stockholders diluted	$ (28,680)		$ (42,245)		$ (58,174)	$ (54,202)
Denominator:
Weighted-average common shares outstanding, basic (in shares)	90,669,499		17,641,147		90,471,950	17,312,437
Weighted-average common shares outstanding, diluted (in shares)	90,669,499		17,641,147		90,471,950	17,312,437
Net loss per share, basic (usd per share)	$ (0.32)		$ (2.39)		$ (0.64)	$ (3.13)
Net loss per share, diluted (usd per share)	$ (0.32)		$ (2.39)		$ (0.64)	$ (3.13)