Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||
| Property, plant and equipment [abstract] | ||||
| Property, plant and equipment |
7,069,000
USD
|
9,536,000
USD
|
— | — |
| Intangible assets and goodwill [abstract] | ||||
| Intangible assets other than goodwill [abstract] | ||||
| Intangible assets other than goodwill |
601,000
USD
|
906,000
USD
|
— | — |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||||
| Investments in associates reported in separate financial statements |
2,397,000
USD
|
3,185,000
USD
|
— | — |
| Trade and other non-current receivables [abstract] | ||||
| Non-current receivables due from related parties | — | — | — | — |
| Non-current receivables due from associates |
6,350,000
USD
|
4,600,000
USD
|
— | — |
| Miscellaneous non-current assets [abstract] | ||||
| Other non-current assets |
475,000
USD
|
878,000
USD
|
— | — |
| Trade and other current receivables [abstract] | ||||
| Current receivables due from related parties | — | — | — | — |
| Current receivables due from associates |
11,381,000
USD
|
—
USD
|
— | — |
| Current prepayments and current accrued income other than current contract assets [abstract] | ||||
| Current prepayments [abstract] | ||||
| Current prepaid expenses |
4,404,000
USD
|
4,309,000
USD
|
— | — |
| Trade and other current receivables |
1,522,000
USD
|
2,376,000
USD
|
— | — |
| Current prepayments and current accrued income including current contract assets [abstract] | ||||
| Categories of non-current financial assets [abstract] | ||||
| Non-current financial assets at fair value through profit or loss [abstract] | ||||
| Non-current financial assets at fair value through profit or loss |
191,426,000
USD
|
317,841,000
USD
|
— | — |
| Cash and cash equivalents [abstract] | ||||
| Cash and cash equivalents |
280,641,000
USD
|
191,081,000
USD
|
149,866,000
USD
|
465,708,000
USD
|
| Miscellaneous assets [abstract] | ||||
| Restricted cash and cash equivalents |
1,642,000
USD
|
1,628,000
USD
|
— | — |
| Borrowings, by type [abstract] | ||||
| Notes and debentures issued |
4,111,000
USD
|
3,699,000
USD
|
— | — |
| Trade and other current payables [abstract] | ||||
| Trade and other current payables |
27,020,000
USD
|
44,107,000
USD
|
— | — |
| Issued capital [abstract] | ||||
| Issued capital |
4,860,000
USD
|
5,461,000
USD
|
— | — |
| Retained earnings [abstract] | ||||
| Retained earnings |
32,486,000
USD
|
83,820,000
USD
|
— | — |
| Accumulated other comprehensive income [abstract] | ||||
| Reserve of exchange differences on translation |
182,000
USD
|
182,000
USD
|
— | — |
| Miscellaneous equity [abstract] | ||||
| Merger reserve |
138,506,000
USD
|
138,506,000
USD
|
— | — |
| Net assets (liabilities) [abstract] | ||||
| Assets |
602,635,000
USD
|
693,973,000
USD
|
— | — |
| Liabilities |
194,702,000
USD
|
235,741,000
USD
|
— | — |
| Net current assets (liabilities) [abstract] | ||||
| Current assets |
386,256,000
USD
|
347,201,000
USD
|
— | — |
| Current liabilities |
41,388,000
USD
|
51,370,000
USD
|
— | — |
| Assets less current liabilities [abstract] |