Stock-based compensation - Schedule of option activity (Details) - USD ($) $ / shares in Units, $ in Thousands	10 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Mar. 05, 2020
2018 Stock Plan
Shares
Options outstanding converted (in shares)					4,678,011
Options outstanding, balance beginning (in shares)	1,886,797	4,599,790	2,734,327
Options exercised (in shares)	(28,057)	(2,668,191)
Options forfeited (in shares)	(50,164)	(15,498)
Options outstanding, balance ending (in shares)	4,599,790	1,916,101	4,599,790	2,734,327
Options vested and exercisable (in shares)		1,791,612
Price
Options outstanding, beginning balance (in dollars per share)	$ 3.54	$ 3.54
Options exercised (in dollars per share)	3.54	3.54
Options forfeited (in dollars per share)	3.54	3.54
Option outstanding, ending balance (in dollars per share)	$ 3.54	3.54	$ 3.54
Options vested and exercisable (in dollars per share)		$ 3.54
Additional Disclosures
Options outstanding, aggregate intrinsic value	$ 41,674	$ 65,971	$ 41,674
Options vested and exercisable, aggregate intrinsic value		$ 61,685
Options outstanding, weighted average contractual term (in years)		6 years 11 months 19 days
Options vested and exercisable, weighted average contractual term (in years)		6 years 11 months 19 days
2020 Equity Incentive Plan
Shares
Options outstanding, balance beginning (in shares)		1,942,400	0
Options granted (in shares)		766,250	2,087,000
Options exercised (in shares)		(112,087)
Options forfeited (in shares)		(371,876)	(144,600)
Options outstanding, balance ending (in shares)	1,942,400	2,224,687	1,942,400	0
Options vested and exercisable (in shares)		596,811
Price
Options outstanding, beginning balance (in dollars per share)		$ 8.38	$ 0
Options granted (in dollars per share)		21.61	8.37
Options exercised (in dollars per share)		8.20
Options forfeited (in dollars per share)		8.88	8.13
Option outstanding, ending balance (in dollars per share)	$ 8.38	12.86	$ 8.38	$ 0
Options vested and exercisable (in dollars per share)		$ 8.32
Additional Disclosures
Options outstanding, aggregate intrinsic value	$ 8,200	$ 55,856	$ 8,200	$ 0
Options vested and exercisable, aggregate intrinsic value		$ 17,694
Options outstanding, weighted average contractual term (in years)		8 years 6 months 10 days
Options vested and exercisable, weighted average contractual term (in years)		8 years 10 days