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Note 12 - Share-based Payments (Details Textual) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Apr. 07, 2023 | Jan. 24, 2022 | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Statement Line Items [Line Items] |  |  |  |  |
Expense from cash-settled share-based payment transactions |  |  | $ 463 | $ 609 | $ 477
Expense from equity-settled share-based payment transactions |  |  | $ 640 | 484 | (0)
Restricted stock units (RSUs) [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Vesting period of other equity instruments |  |  | 3 |  |
Performance share units (PSUs) [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Liabilities from share-based payment transactions |  |  | $ 1,294 | 2,217 |
Expense from cash-settled share-based payment transactions |  |  | 463 | 609 | 477
Value of other equity instruments exercised or vested in share-based payment arrangement, share capital |  |  | 351 | 804 | 0
Performance share units (PSUs) [member] | Production costs [Member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Total expense from share-based payment transactions |  |  | $ 660 | $ 853 | 692
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 multiplier |  |  | 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% |
Performance multiplier |  |  | 100.00% | 100.00% |
Equity-settled performance units (EPUs) [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Vesting period of other equity instruments |  |  | 3 |  |
Performance probability |  |  | 100.00% |  |
Performance multiplier | 100.00% | 100.00% | 100.00% |  |
Expense from equity-settled share-based payment transactions |  |  | $ 640 | $ 417 | 0
Share option programs [member] |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |
Expense from equity-settled share-based payment transactions |  |  | $ 0 | $ 67 | $ 0
Option life, share options granted |  |  | 10 |  |
Share-based compensation arrangement, percentage of outstanding stock maximum |  |  | 10.00% |  |
Number of share options outstanding in share-based payment arrangement at end of period |  |  | 20,000 |  |

X
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