Net loss per share attributable to common stockholders (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
Net loss per share attributable to common stockholders
Net loss	$ (17,495)	$ (16,399)	$ (5,563)	$ (8,082)	$ (33,894)	$ (13,645)
Dividends accrued on redeemable convertible preferred stock			(245)			(1,435)
Accretion of redeemable convertible preferred stock			(296)			(296)
Adjusted net loss attributable to common stockholders	$ (17,495)		$ (6,104)		$ (33,894)	$ (15,376)
Weighted-average shares outstanding, basic	37,612,331		29,974,811		37,538,821	16,415,800
Weighted-average shares outstanding, diluted	37,612,331		29,974,811		37,538,821	16,415,800
Net loss per share attributable to common stockholders, basic	$ (0.47)		$ (0.20)		$ (0.90)	$ (0.94)
Net loss per share attributable to common stockholders, diluted	$ (0.47)		$ (0.20)		$ (0.90)	$ (0.94)