Financial instruments - Financial Obligations (Details) $ in Thousands	6 Months Ended
Jun. 30, 2025 USD ($)
Other Commitments [Line Items]
Carrying amount	$ 24,441
Contractual cash flows	26,065
Contractual obligation, due less than 1 year	22,506
Contractual obligation, due 1-3 years	2,228
Contractual obligation, due 4-5 years	1,038
Contractual obligation, due after 5 years	293
Accounts payable and accrued liabilities
Other Commitments [Line Items]
Carrying amount	17,594
Contractual cash flows	17,594
Contractual obligation, due less than 1 year	17,594
Contractual obligation, due 1-3 years	0
Contractual obligation, due 4-5 years	0
Contractual obligation, due after 5 years	0
Term loan facility (note 12)
Other Commitments [Line Items]
Carrying amount	4,882
Contractual cash flows	5,601
Contractual obligation, due less than 1 year	4,576
Contractual obligation, due 1-3 years	1,025
Contractual obligation, due 4-5 years	0
Contractual obligation, due after 5 years	0
Operating lease obligations (note 11)
Other Commitments [Line Items]
Carrying amount	1,965
Contractual cash flows	2,870
Contractual obligation, due less than 1 year	336
Contractual obligation, due 1-3 years	1,203
Contractual obligation, due 4-5 years	1,038
Contractual obligation, due after 5 years	$ 293

Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 235
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3

+ Details

Name:	us-gaap_ContractualObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of contractual obligation to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_ContractualObligationDueAfterFifthYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of contractual obligation to be paid in fourth and fifth fiscal years following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_ContractualObligationDueInFourthAndFifthYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of contractual obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_ContractualObligationDueInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of contractual obligation to be paid in second and third fiscal years following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

+ Details

Name:	us-gaap_ContractualObligationDueInSecondAndThirdYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_OtherCommitmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the amount of contractual cashflows obligation repayments.

+ References

No definition available.

+ Details

Name:	wprt_ContractualObligationsRepaymentsTotal
Namespace Prefix:	wprt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	wprt_ContractualObligationsTypeAxis=us-gaap_AccountsPayableAndAccruedLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	wprt_ContractualObligationsTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	wprt_ContractualObligationsTypeAxis=wprt_OperatingLeaseExpensesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: