Share-based compensation - Unregistered Securities (Details) - Plan - USD ($) |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2021 |
Dec. 31, 2020 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Granted | 62,734 | |
| Exercise price | $ 7.26 | |
| Remaining contractual term | 9 years 8 months 26 days | 9 years 11 months 23 days |
| Intrinsic value of options outstanding | $ 0 | |
| Non-qualified stock options | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Granted | 292,500 | |
| Term | 10 years | |
| Exercise price | $ 10.00 | |
| Vesting percentage | 100.00% | |
| Remaining contractual term | 9 years 8 months 19 days | |
| Unrecognized compensation expense | $ 0 | |
| Intrinsic value of options outstanding | 0 | |
| Intrinsic value of options outstanding | $ 0 |
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- 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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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- 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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- Definition Percentage of vesting of award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- 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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- Definition Terms of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. No definition available.
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