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Intangible assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Intangible assets |  |
Opening net book value | $ 680 | $ 1,435
Foreign exchange | 12 | (51)
Amortization | (202) | (704)
Closing net book value | 490 | 680
Cost | 5,346 | 5,346
Accumulated amortization | (4,856) | (4,666)
Net book value | 490 | 680
Exclusive licence agreement |  |
Intangible assets |  |
Opening net book value | 135 | 165
Foreign exchange | 3 | (5)
Amortization | (21) | (25)
Closing net book value | 117 | 135
Cost | 231 | 231
Accumulated amortization | (114) | (96)
Net book value | 117 | 135
Software |  |
Intangible assets |  |
Opening net book value | 545 | 770
Foreign exchange | 9 | (32)
Amortization | (181) | (193)
Closing net book value | 373 | 545
Cost | 978 | 978
Accumulated amortization | (605) | (433)
Net book value | 373 | 545
Proprietary technology |  |
Intangible assets |  |
Opening net book value |  | 417
Foreign exchange |  | (10)
Amortization |  | (407)
Cost | 3,456 | 3,456
Accumulated amortization | (3,456) | (3,456)
Net book value |  |
Brand |  |
Intangible assets |  |
Opening net book value |  | 83
Foreign exchange |  | (4)
Amortization |  | (79)
Cost | 681 | 681
Accumulated amortization | $ (681) | $ (681)
Net book value |  |

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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 2023-01-01 -Paragraph 118 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2023-en-r&anchor=para_118_e&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 54 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_c&doctype=Standard -URIDate 2023-03-23 + Details
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