Share-based compensation (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2020 |
Jun. 30, 2019 |
Jun. 30, 2020 |
Jun. 30, 2019 |
Dec. 19, 2019 |
Apr. 29, 2019 |
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| Stock Awards [Abstract] | ||||||
| Share-based compensation expense | $ 3.0 | $ 4.0 | $ 5.5 | $ 4.2 | ||
| Stock Options [Member] | ||||||
| Stock Awards [Abstract] | ||||||
| Granted (in shares) | 200,000 | 5,833,000 | 300,000 | 5,833,000 | ||
| 2019 Incentive Award Plan [Member] | ||||||
| Stock Awards [Abstract] | ||||||
| Authorized issuance shares of common stock (in shares) | 6,000,000 | |||||
| Amended and Restated Incentive Award Plan 2019 [Member] | ||||||
| Stock Awards [Abstract] | ||||||
| Authorized issuance shares of common stock (in shares) | 9,000,000 | |||||
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Number of shares authorized for issuance under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Details
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