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Note 12 - Share-based Payments (Details Textual) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 31, 2019 | Aug. 31, 2018 | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2021 GBP (£) | Sep. 30, 2020
Statement Line Items [Line Items] |  |  |  |  |  |  |
Expense from cash-settled share-based payment transactions |  |  | $ 692,000 | $ 634,000 | $ 107,000 |  |
Expense from cash-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets |  |  | $ 477,000 | 1,413,000 | 689,000 |  |
Restricted stock units (RSUs) [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Vesting period of other equity instruments |  |  | 3 |  |  |  |
Weighted average fair value at measurement date, other equity instruments granted |  |  | $ 12.06 | 15.88 |  |  |
Performance share units (PSUs) [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Liabilities from share-based payment transactions |  |  | 3,027,000 | 2,240,000 |  |  |
Expense from cash-settled share-based payment transactions |  |  | 692,000 | 634,000 | 107,000 |  |
Value of other equity instruments exercised or vested in share-based payment arrangement, share capital |  |  | 420,000 | 216,000 |  |  |
Weighted average fair value at measurement date, other equity instruments granted |  |  | $ 11.63 | $ 15.51 |  |  |
Performance share units (PSUs) [member] | Bottom of range [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Vesting period of other equity instruments |  |  | 1 |  |  |  |
Performance probability |  |  | 93.00% | 93.00% |  |  |
Performance share units (PSUs) [member] | Top of range [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Vesting period of other equity instruments |  |  | 3 |  |  |  |
Performance probability |  |  | 100.00% | 100.00% |  |  |
Cash-settled awards [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Vesting period of other equity instruments | 3 | 3 |  |  |  |  |
Liabilities from share-based payment transactions |  |  | $ 0 | $ 30,000 |  |  |
Weighted average fair value at measurement date, other equity instruments granted | £ |  |  |  |  |  | £ 8.90 |
Expense from cash-settled share-based payment transactions in which goods or services received did not qualify for recognition as assets |  |  | $ (38,000) | $ 114,000 | $ 73,000 |  |
Percentage of discretionary cash bonus |  |  |  |  |  |  | 10.00%

X
- Definition The amount of expense arising from cash-settled share-based payment transactions. + References No definition available. + Details
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- Definition The percentage of discretionary cash bonus. + References No definition available. + Details
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- Definition The probability that performance conditions will be met on performance share units. + References No definition available. + Details
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- Definition The amount of expense arising from cash-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Share-based payment arrangements [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 51 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_51_b_i&doctype=Standard -URIDate 2021-03-24 + Details
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