Net loss per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net loss attributable to common stockholders	$ (15,303)	$ (21,231)	$ (52,797)	$ (55,276)
Denominator:
Weighted-average number of common shares outstanding, basic (in shares)	67,716	67,716	67,716	67,053
Weighted-average number of common shares outstanding, diluted (in shares)	67,716	67,716	67,716	67,053
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.23)	$ (0.31)	$ (0.78)	$ (0.82)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.23)	$ (0.31)	$ (0.78)	$ (0.82)