Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2024-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment |
271,170,000
USD
|
274,382,000
USD
|
252,414,000
USD
|
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables |
19,363,000
USD
|
17,617,000
USD
|
17,042,000
USD
|
| Trade and other current receivables [abstract] | |||
| Current receivables from taxes other than income tax |
43,749,000
USD
|
40,575,000
USD
|
37,576,000
USD
|
| Trade and other current receivables |
7,062,000
USD
|
13,378,000
USD
|
5,389,000
USD
|
| 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 |
5,111,000
USD
|
10,035,000
USD
|
42,000
USD
|
| Categories of current financial assets [abstract] | |||
| Current financial assets at fair value through profit or loss [abstract] | |||
| Current financial assets at fair value through profit or loss |
23,976,000
USD
|
-
USD
|
-
USD
|
| Classes of current inventories [abstract] | |||
| Current inventories |
18,767,000
USD
|
16,684,000
USD
|
19,590,000
USD
|
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash [abstract] | |||
| Cash |
181,908,000
USD
|
152,984,000
USD
|
— |
| Cash and cash equivalents |
181,908,000
USD
|
152,984,000
USD
|
221,476,000
USD
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | |||
| Non-current assets or disposal groups classified as held for sale |
-
USD
|
-
USD
|
9,000,000
USD
|
| Miscellaneous current assets [abstract] | |||
| Current investments |
1,253,000
USD
|
14,076,000
USD
|
55,566,000
USD
|
| Trade and other current payables [abstract] | |||
| Current payables on social security and taxes other than income tax |
1,201,000
USD
|
1,184,000
USD
|
1,221,000
USD
|
| Trade and other current payables |
21,403,000
USD
|
26,862,000
USD
|
33,372,000
USD
|
| Miscellaneous non-current liabilities [abstract] | |||
| Non-current net defined benefit liability |
11,073,000
USD
|
11,298,000
USD
|
10,874,000
USD
|
| Miscellaneous current liabilities [abstract] | |||
| Current dividend payables |
46,000
USD
|
41,000
USD
|
32,000
USD
|
| Issued capital [abstract] | |||
| Issued capital |
15,504,000
USD
|
15,504,000
USD
|
15,504,000
USD
|
| Retained earnings [abstract] | |||
| Retained earnings |
877,394,000
USD
|
816,140,000
USD
|
715,631,000
USD
|
| Accumulated other comprehensive income [abstract] | |||
| Reserve of exchange differences on translation |
364,402,000
USD
|
341,180,000
USD
|
288,891,000
USD
|
| Miscellaneous equity [abstract] | |||
| Capital redemption reserve |
1,087,000
USD
|
1,087,000
USD
|
1,087,000
USD
|
| Net assets (liabilities) [abstract] | |||
| Assets (liabilities) |
558,458,000
USD
|
520,615,000
USD
|
575,690,000
USD
|
| Net current assets (liabilities) [abstract] | |||
| Current assets |
303,088,000
USD
|
260,613,000
USD
|
358,880,000
USD
|
| Current liabilities |
28,423,000
USD
|
31,338,000
USD
|
44,928,000
USD
|
| Current assets (liabilities) |
274,665,000
USD
|
229,275,000
USD
|
313,952,000
USD
|
| Assets less current liabilities [abstract] |