Stockholders' equity - Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions	Sep. 12, 2022	Jul. 06, 2021	Mar. 05, 2020	Dec. 31, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Common stock, shares authorized (in shares)				110,000,000	110,000,000
Price per share (in dollars per share)		$ 15.03
Common stock, shares outstanding (in shares)				75,887,475	74,156,458
Stock options vested, shares (in shares)			3,100,000
Follow On Public Offering
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		11,600,000
Follow On Public Offering - Shares From Parent
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		5,500,000
Sale of stock, consideration received on transaction		$ 78.3
Follow On Public Offering - Shares From Selling Shareholders
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		6,100,000
Sale of stock, consideration received on transaction		$ 0.0
Initial Offering | ChaSerg | Equity Unit
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)			22,000,000
Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)				110,000,000
Price per share (in dollars per share)	$ 17.5
Common stock, shares outstanding (in shares)				75,900,000
Common Stock | Follow On Public Offering
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	6,600,000
Common Stock | Follow On Public Offering - Shares From Parent
Class of Stock [Line Items]
Sale of stock, consideration received on transaction	$ 109.5