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Note 17 - Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands | 1 Months Ended | 4 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2022 | Apr. 28, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Nov. 01, 2022 | Jun. 23, 2017
Statement Line Items [Line Items] |  |  |  |  |  |  |
Additions other than through business combinations, property, plant and equipment |  |  | $ 48,220 | $ 31,479 |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  | 8,209 | 498 | $ 0 |  |
Total property, plant and equipment | $ 178,983 |  | 178,983 | 149,102 |  |  |
Borrowings, interest rate |  |  |  |  |  |  | 7.25%
Loan notes payable [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Notional amount | $ 12,000 |  | $ 12,000 |  |  | $ 7,250 |
Borrowings, interest rate | 9.50% |  | 9.50% |  |  | 13.00% |
Borrowings, term (Year) | 3 years |  |  |  |  |  |
Loan notes payable [member] | Issuance of borrowings [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Proceeds from borrowings |  | $ 4,500 |  |  |  |  |
Construction in progress [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Additions other than through business combinations, property, plant and equipment |  |  | $ 468 | 408 |  |  |
Development assets [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  | 8,518 |  |  |  |
Power generating assets [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  | 791 |  |  |  |
Loader bottom decks [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  | 101 |  |  |  |
Gensets [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  | 1,001 |  |  |
Guide ropes [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Impairment loss recognised in profit or loss, property, plant and equipment |  |  |  | 310 |  |  |
Impaired assets [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Total property, plant and equipment | $ 0 |  | $ 0 |  |  |  |
Central Shaft [member] |  |  |  |  |  |  |
Statement Line Items [Line Items] |  |  |  |  |  |  |
Increase (decrease) through transfers, property, plant and equipment |  |  |  | $ 18,509 |  |  |

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