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Intangible assets - Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Reconciliation of Changes in Intangible assets [Roll Forward]
Beginning balance	$ 1,406	$ 5,214
Additions to intangible assets	1,768	154
Amortization expense	(759)	(1,696)
Impairment charges on intangible assets	(658)	(2,266)
At December 31, 2023		1,406
Impaired asset retirement adjustment	0	0
Ending balance	1,757	1,406
Cost
Reconciliation of Changes in Intangible assets [Roll Forward]
Beginning balance	59,582	79,227
Additions to intangible assets	1,768	154
Amortization expense	0
Impairment charges on intangible assets
At December 31, 2023		79,381
Impaired asset retirement adjustment	6,269	19,799
Ending balance	55,081	59,582
Accumulated depreciation
Reconciliation of Changes in Intangible assets [Roll Forward]
Beginning balance	(58,176)	(74,013)
Additions to intangible assets	0	0
Amortization expense	759	1,696
Impairment charges on intangible assets	(658)	(2,266)
At December 31, 2023		77,975
Impaired asset retirement adjustment	(6,269)	(19,799)
Ending balance	$ (53,324)	$ (58,176)

X

- Definition

Intangible Assets Other than Goodwill, Excluding Asset Impairment Adjustment

+ References

No definition available.

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- Definition

Reconciliation of Changes in Intangible assets

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- Definition

The amount of additions to intangible assets other than goodwill, other than those acquired through business combinations. [Refer: Total for all business combinations [member]; Intangible assets other than goodwill]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 38
-IssueDate 2024-01-01
-Paragraph 118
-Subparagraph e
-Clause i
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- Definition

The amount of amortisation of intangible assets other than goodwill. [Refer: Depreciation and amortisation expense; Intangible assets other than goodwill]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 38
-IssueDate 2024-01-01
-Paragraph 118
-Subparagraph e
-Clause vi
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e_vi&doctype=Standard
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- Definition

The amount of impairment loss recognised in profit or loss for intangible assets other than goodwill. [Refer: Impairment loss recognised in profit or loss; Intangible assets other than goodwill]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 38
-IssueDate 2024-01-01
-Paragraph 118
-Subparagraph e
-Clause iv
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2024-en-r&anchor=para_118_e_iv&doctype=Standard
-URIDate 2024-03-27

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- Definition

The amount of identifiable non-monetary assets without physical substance. This amount does not include goodwill. [Refer: Goodwill]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 38
-IssueDate 2024-01-01
-Paragraph 118
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 54
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_c&doctype=Standard
-URIDate 2024-03-27

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- Definition

The decrease in intangible assets other than goodwill resulting from retirements. [Refer: Intangible assets other than goodwill]

+ References

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-Number 38
-IssueDate 2024-01-01
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