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Share capital, stock options and other stock-based plans (Tables)

9 Months Ended

Sep. 30, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity

A continuity of the Units issued under the Westport Omnibus Plan are as follows:

						Nine months ended September 30, 2025												Nine months ended September 30, 2024
						Number of Units						Weighted average grant date fair value (CDN $)						Number of Units						Weighted average grant date fair value (CDN $)
Outstanding, beginning of period						524,322						$	11.75					478,643						$	15.68
Granted						427,691						3.28						224,050						8.23
Exercised						(68,071)						17.48						(90,362)						17.58
Forfeited/expired						(146,457)						11.82						(54,614)						22.15
Outstanding, end of period						737,485						$	6.28					557,717						$	11.73
Units outstanding and exercisable, end of period						491						$	31.07					—						$	—

Schedule of Share Based Compensation Arrangement by Share Based Payment Award Intrinsic Value

The aggregate intrinsic value of the Company’s share units at September 30, 2025 as follows:

						September 30, 2025
						(CDN $)
Share units:
Outstanding						$	2,358
Exercisable						15
Exercised						218

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

Stock-based compensation associated with the Unit plans is included in operating expenses as follows:

						Three Months Ended September 30,												Nine Months Ended September 30,
						2025						2024						2025						2024
Cost of revenue						$	—					$	36					$	—					$	113
Research and development						12						53						40						216
General and administrative						(215)						(269)						465						875
Sales and marketing						(18)						40						10						148
						$	(221)					$	(140)					$	515					$	1,352

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- References

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

+ References

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-SubTopic 10
-Topic 718
-Publisher FASB
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)
-SubTopic 10
-Topic 718
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Tabular disclosure of the intrinsic value of stock option awards and share units.

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