Stockholders' equity - Warrants (Details) $ / shares in Units, $ in Thousands							12 Months Ended
	Jul. 28, 2021 USD ($) $ / shares shares	Jul. 26, 2021 USD ($) shares	Mar. 05, 2020 tradingDay $ / shares	Mar. 05, 2020 redeemableWarrant tradingDay $ / shares	Mar. 05, 2020 shares tradingDay $ / shares	Mar. 05, 2020 commonStock tradingDay $ / shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($)	Aug. 30, 2021 $ / shares shares
Class of Stock [Line Items]
Exercise prices (in dollars per share) | $ / shares	$ 11.50
Redemption price (in dollars per share) | $ / shares			$ 0.01	$ 0.01	$ 0.01	$ 0.01
Redemption, minimum days of prior written notice			30 days
Common stock, threshold price trigger (in dollars per share) | $ / shares			$ 18.00	$ 18.00	$ 18.00	$ 18.00
Warrant redemption, trading days threshold | tradingDay			20	20	20	20
Warrant redemption, consecutive trading days threshold | tradingDay			30	30	30	30
Proceeds from exercise of warrants | $							$ 0	$ 0	$ 48,145
Class Of Warrant Or Right, Exercisable, Period	5 years
ChaSerg | Working Capital Sponsor Loan, Equity Units
Class of Stock [Line Items]
Shares issued upon debt conversion (in shares)					100,000
ChaSerg | Working Capital Sponsor Loan, Common Stock
Class of Stock [Line Items]
Shares issued upon debt conversion (in shares)					1
ChaSerg | Working Capital Sponsor Loan, Redeemable Warrant
Class of Stock [Line Items]
Shares issued upon debt conversion (in shares)					0.5
Public Warrant
Class of Stock [Line Items]
Redemption price (in dollars per share) | $ / shares										$ 0.01
Warrants exercised (in shares)	2,800,000	1,400,000
Proceeds from exercise of warrants | $	$ 31,700	$ 16,400
Warrants outstanding (in shares)	2,800,000						0	0
Warrants redeemed (in shares)										20,000.00
Private Warrant
Class of Stock [Line Items]
Warrants outstanding (in shares)							0	0
Initial Offering | ChaSerg
Class of Stock [Line Items]
Sale of stock, components of units issued in transaction (in shares)				0.5		1
Initial Offering | Equity Unit | ChaSerg
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)					22,000,000
Over-Allotment Option | ChaSerg
Class of Stock [Line Items]
Sale of stock, components of units issued in transaction (in shares)				0.5		1
Over-Allotment Option | Equity Unit | ChaSerg
Class of Stock [Line Items]
Sale of stock, components of units issued in transaction (in shares)					600,000