Stock-based compensation - Restricted Stock Narratives (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
Oct. 31, 2020	Mar. 31, 2022
2015 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Partner capital units converted (units)	3,329,707
Restricted stock \| 2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Conversion of redeemable convertible preferred stock (in shares)	2,671,907
Share based compensation expense not yet recognized other than options		$ 10.2
Share based compensation expense not yet recognized, recognition period (years)		2 years
Restricted stock \| 2021 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Share based compensation expense not yet recognized other than options		$ 0.5
Share based compensation expense not yet recognized, recognition period (years)		3 years 4 months 24 days
Granted (in shares)		68,175
Shares outstanding (in shares)		68,175

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of units converted into shares of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.

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Net number of non-option equity instruments granted to participants.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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Number of shares issued during the period as a result of the conversion of convertible securities.

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