Property and equipment - Summary of property and equipment (Detail) - USD ($) $ in Thousands | 12 Months Ended |
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | $ 220 | $ 316 | |
Foreign exchange | | 0 | |
Property, plant and equipment | 128 | 220 | $ 316 |
Gross carrying amount [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | 562 | 552 | 269 |
Additions | 33 | | 337 |
Disposals | (126) | | (70) |
Foreign exchange | | 10 | 16 |
Property, plant and equipment | 475 | 562 | 552 |
Accumulated depreciation and amortisation [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | (342) | (236) | (182) |
Depreciation | (118) | (98) | (105) |
Disposals | 113 | | 65 |
Foreign exchange | | (8) | (14) |
Property, plant and equipment | (347) | (342) | (236) |
Office equipment [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | 25 | 40 | |
Property, plant and equipment | 20 | 25 | 40 |
Office equipment [member] | Gross carrying amount [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | 54 | 53 | 50 |
Disposals | (3) | | |
Foreign exchange | | 1 | 3 |
Property, plant and equipment | 52 | 54 | 53 |
Office equipment [member] | Accumulated depreciation and amortisation [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | (29) | (23) | (15) |
Depreciation | (7) | (6) | (7) |
Disposals | 3 | | 0 |
Foreign exchange | | 0 | (1) |
Property, plant and equipment | (32) | (29) | (23) |
Computer equipment [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | 8 | 11 | |
Property, plant and equipment | 23 | 8 | 11 |
Computer equipment [member] | Gross carrying amount [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | 118 | 114 | 143 |
Additions | 33 | | |
Disposals | (123) | | (33) |
Foreign exchange | | 4 | 4 |
Property, plant and equipment | 30 | 118 | 114 |
Computer equipment [member] | Accumulated depreciation and amortisation [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | (110) | (103) | (125) |
Depreciation | (6) | (4) | (2) |
Disposals | 110 | | 32 |
Foreign exchange | | (3) | (8) |
Property, plant and equipment | (7) | (110) | (103) |
Feild Equipment [Member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | 0 | 0 | |
Property, plant and equipment | 0 | 0 | 0 |
Feild Equipment [Member] | Gross carrying amount [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | 0 | | 35 |
Disposals | | | (37) |
Foreign exchange | | | 2 |
Property, plant and equipment | 0 | 0 | |
Feild Equipment [Member] | Accumulated depreciation and amortisation [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | 0 | 0 | (31) |
Depreciation | | 0 | 0 |
Disposals | 0 | | 33 |
Foreign exchange | | 0 | (2) |
Property, plant and equipment | 0 | 0 | 0 |
Buildings [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | 22 | 26 | |
Property, plant and equipment | 17 | 22 | 26 |
Buildings [member] | Gross carrying amount [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | 45 | 44 | 41 |
Foreign exchange | | 1 | 3 |
Property, plant and equipment | 46 | 45 | 44 |
Buildings [member] | Accumulated depreciation and amortisation [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | (23) | (18) | (11) |
Depreciation | (6) | (5) | (6) |
Disposals | 0 | | 0 |
Foreign exchange | | 0 | (1) |
Property, plant and equipment | (29) | (23) | (18) |
Right-of-use assets [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | 165 | 249 | |
Property, plant and equipment | 68 | 165 | 249 |
Right-of-use assets [member] | Gross carrying amount [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | 345 | 341 | |
Additions | | | 337 |
Foreign exchange | | 4 | 4 |
Property, plant and equipment | 347 | 345 | 341 |
Right-of-use assets [member] | Accumulated depreciation and amortisation [member] | | | |
Disclosure of detailed information about property, plant and equipment [line items] | | | |
Property, plant and equipment | (180) | (92) | 0 |
Depreciation | (99) | (83) | (90) |
Disposals | 0 | | 0 |
Foreign exchange | | (5) | (2) |
Property, plant and equipment | $ (279) | $ (180) | $ (92) |