Property, plant and equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Property, Plant and Equipment [Line Items]
Cost	$ 22,257	$ 22,165
Accumulated Depreciation	16,463	16,560
Net Book Value	5,794	5,605
Computer equipment and software
Property, Plant and Equipment [Line Items]
Cost	3,586	3,598
Accumulated Depreciation	2,853	2,855
Net Book Value	733	743
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Cost	118	119
Accumulated Depreciation	90	90
Net Book Value	28	29
Machinery and equipment
Property, Plant and Equipment [Line Items]
Cost	13,592	13,584
Accumulated Depreciation	9,429	9,505
Net Book Value	4,163	4,079
Leasehold improvements
Property, Plant and Equipment [Line Items]
Cost	4,961	4,864
Accumulated Depreciation	4,091	4,110
Net Book Value	$ 870	$ 754

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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