Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||||
| Property, plant and equipment [abstract] | |||||
| Property, plant and equipment |
22,957,000
USD
|
— |
26,771,000
USD
|
— | — |
| Intangible assets and goodwill [abstract] | |||||
| Intangible assets other than goodwill [abstract] | |||||
| Intangible assets other than goodwill |
831,000
USD
|
— |
987,000
USD
|
— | — |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | |||||
| Investments in associates reported in separate financial statements |
9,147,000
USD
|
— |
—
USD
|
— | — |
| Trade and other non-current receivables [abstract] | |||||
| Non-current receivables due from related parties | — | — | — | — | — |
| Non-current receivables due from associates |
16,501,000
USD
|
— |
—
USD
|
— | — |
| Miscellaneous non-current assets [abstract] | |||||
| Non-current finance lease receivables |
835,000
USD
|
— |
1,285,000
USD
|
— | — |
| Other non-current assets |
10,000
USD
|
— |
810,000
USD
|
— | — |
| Trade and other current receivables [abstract] | |||||
| Current receivables due from related parties | — | — | — | — | — |
| Current receivables due from associates |
—
USD
|
— |
15,120,000
USD
|
— | — |
| Current prepayments and current accrued income other than current contract assets [abstract] | |||||
| Current prepayments [abstract] | |||||
| Current prepaid expenses |
11,617,000
USD
|
— |
10,755,000
USD
|
— | — |
| Trade and other current receivables |
11,867,000
USD
|
— |
3,174,000
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 |
251,892,000
USD
|
— |
397,179,000
USD
|
— | — |
| Cash and cash equivalents [abstract] | |||||
| Cash [abstract] | |||||
| Cash | — |
479,000
USD
|
— | — | — |
| Cash and cash equivalents |
149,866,000
USD
|
— |
465,708,000
USD
|
403,881,000
USD
|
132,360,000
USD
|
| Miscellaneous current assets [abstract] | |||||
| Current finance lease receivables |
450,000
USD
|
— |
415,000
USD
|
— | — |
| Miscellaneous assets [abstract] | |||||
| Restricted cash and cash equivalents |
2,124,000
USD
|
— |
2,124,000
USD
|
— | — |
| Borrowings [abstract] | |||||
| Non-current portion of non-current borrowings |
10,244,000
USD
|
— |
14,261,000
USD
|
— | — |
| Current borrowings and current portion of non-current borrowings [abstract] | |||||
| Current portion of non-current borrowings |
5,156,000
USD
|
— |
857,000
USD
|
— | — |
| Non-current portion of non-current borrowings, by type [abstract] | |||||
| Borrowings, by type [abstract] | |||||
| Notes and debentures issued |
2,345,000
USD
|
3,403,000
USD
|
4,641,000
USD
|
— | — |
| Trade and other current payables [abstract] | |||||
| Current accruals and current deferred income including current contract liabilities [abstract] | |||||
| Current deferred income including current contract liabilities [abstract] | |||||
| Current contract liabilities [abstract] | |||||
| Current contract liabilities |
2,185,000
USD
|
— |
65,000
USD
|
— | — |
| Trade and other current payables |
54,840,000
USD
|
1,407,000
USD
|
35,817,000
USD
|
— | — |
| Miscellaneous current liabilities [abstract] | |||||
| Current derivative financial liabilities |
47,000
USD
|
— |
6,787,000
USD
|
— | — |
| Issued capital [abstract] | |||||
| Issued capital, preference shares | — |
15,853,000
USD
|
— | — | — |
| Issued capital |
5,455,000
USD
|
— |
5,444,000
USD
|
— | — |
| Retained earnings [abstract] | |||||
| Retained earnings |
149,516,000
USD
|
— |
199,871,000
USD
|
— | — |
| Accumulated other comprehensive income [abstract] | |||||
| Reserve of exchange differences on translation |
89,000
USD
|
— |
469,000
USD
|
— | — |
| Miscellaneous equity [abstract] | |||||
| Merger reserve |
138,506,000
USD
|
— |
138,506,000
USD
|
— | — |
| Net assets (liabilities) [abstract] | |||||
| Assets |
702,647,000
USD
|
— |
946,006,000
USD
|
— | — |
| Liabilities |
155,057,000
USD
|
— |
361,859,000
USD
|
— | — |
| Net current assets (liabilities) [abstract] | |||||
| Current assets |
386,192,000
USD
|
— |
501,809,000
USD
|
— | — |
| Current liabilities |
96,885,000
USD
|
— |
226,135,000
USD
|
— | — |
| Assets less current liabilities [abstract] |