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Intangible assets | 12 Months Ended
--- | ---
Dec. 31, 2021
Intangible Assets [Abstract] |
Intangible assets | Intangible assets:
| December 31, 2021 |  | December 31, 2020
Intellectual property acquired from UTC | $ | 74 |  |  | $ | 522 |
ERP management reporting software system | 3,631 |  |  | 3,242 |
Intellectual property acquired from Ballard Motive Solutions, net of amortization (note 7) | 17,083 |  |  | — |
| $ | 20,788 |  |  | $ | 3,764 |
|  |  | Accumulated |  | Net carrying
| Cost |  | amortization |  | amount
At January 1, 2020 | $ | 60,409 |  |  | $ | 54,722 |  |  | $ | 5,687 |
Additions to intangible assets | 246 |  |  | — |  |  | 246 |
Amortization expense | — |  |  | 1,657 |  |  | (1,657) |
Disposals | (800) |  |  | (288) |  |  | (512) |
At December 31, 2020 | 59,855 |  |  | 56,091 |  |  | 3,764 |
Acquisition of intangible assets | 17,279 |  |  | — |  |  | 17,279 |
Additions to intangible assets | 1,543 |  |  | — |  |  | 1,543 |
Amortization expense | — |  |  | 1,798 |  |  | (1,798) |
At December 31, 2021 | $ | 78,677 |  |  | $ | 57,889 |  |  | $ | 20,788 |
Acquisition of intangible assets in 2021 relate to the acquisition of Arcola's (Ballard Motive Solutions) intangible assets of $17,279,000 (note 7). Additions to intangible assets of $1,543,000 consist primarily of a new Phase 3 of enhancements of $1,385,000 (2020 - $nil) and $158,000 (2020 - $246,000) of costs primarily for a Manufacturing Execution System, both of which enhance the capabilities of the ERP management reporting software system. Amortization expense on intangible assets is allocated to research and product development expense or general and administration expense depending upon the nature of the underlying assets. In 2021, amortization of $1,798,000 (2020 - $1,657,000) was recorded.

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- Definition The entire disclosure for intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2021-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2021-en-r&doctype=Standard&dita_xref=IAS38_g118-128_TI -URIDate 2021-03-24 + Details
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