Stock-based compensation - Stock option activity (Details) - USD ($) $ / shares in Units, $ in Millions |
1 Months Ended | 2 Months Ended | 3 Months Ended | 4 Months Ended | 6 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 12, 2021 |
Jun. 11, 2021 |
Jun. 11, 2021 |
Jul. 31, 2021 |
Jul. 31, 2021 |
Apr. 30, 2021 |
Jul. 31, 2020 |
Apr. 30, 2020 |
Jun. 11, 2021 |
Jul. 31, 2021 |
Jul. 31, 2020 |
Jan. 31, 2021 |
Jan. 31, 2020 |
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| Weighted Average Remaining Contractual Term (Years) | |||||||||||||
| Financial Designation, Predecessor and Successor [Fixed List] | Successor | Predecessor | Successor | Successor | Predecessor | Predecessor | Predecessor | Predecessor | Successor | Predecessor | Predecessor | Predecessor | |
| Stock Options | |||||||||||||
| Shares | |||||||||||||
| Granted (in shares) | 2,198,000 | ||||||||||||
| Outstanding at end period (in shares) | 2,198,000 | 2,198,000 | 2,198,000 | ||||||||||
| Weighted Average Exercise Price | |||||||||||||
| Weighted Average Exercise Price Granted (in dollars per share) | $ 10.75 | ||||||||||||
| Weighted Average Exercise Price Outstanding at end period (in dollars per share) | $ 10.75 | $ 10.75 | $ 10.75 | ||||||||||
| Weighted Average Remaining Contractual Term (Years) | |||||||||||||
| Weighted Average Remaining Contractual Term Outstanding (in Years) | 4 years | 3 years 10 months 24 days | |||||||||||
| Unrecognized equity-based compensation costs | $ 7.1 | $ 7.1 | $ 7.1 | ||||||||||
| Cost expected to be recognized over a weighted-average period | 3 years 10 months 24 days | ||||||||||||
| X | ||||||||||
- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Indicates designation of financial information when substantially all business or separately identifiable line of business transfers from one entity to another entity. Acceptable values are "Predecessor" and "Successor". Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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| X | ||||||||||
- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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