Shareholders' equity - Additional paid-in capital (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
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| Additional paid-in capital | ||
| Opening balance | $ 143,119 | $ 114,917 |
| Share-based compensation expense | 1,368 | 981 |
| Exercise of stock options | 19 | 77 |
| Closing balance | 131,992 | 99,632 |
| Additional paid-in capital | ||
| Additional paid-in capital | ||
| Opening balance | 8,530 | 3,805 |
| Share-based compensation expense | 1,368 | 981 |
| Exercise of stock options | (15) | (56) |
| Closing balance | $ 9,883 | $ 4,730 |
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- Definition Amount of increase to additional paid-in capital (APIC) for recognition of cost for 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 Value of stock issued as a result of the exercise of stock options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Details
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