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Revenue
 12 Months Ended
Dec. 31, 2024
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
a) Disaggregation of revenue
Year ended December 31,20242023
Revenue by source
Operations support services$1,121,802 $886,963 
Equipment and component sales40,324 65,282 
Construction services3,661 12,435 
$1,165,787 $964,680 
By commercial terms
Time-and-materials$1,026,027 $583,068 
Unit-price125,728 363,979 
Lump-sum14,032 17,633 
 $1,165,787 $964,680 
Revenue recognition method
As-invoiced$1,059,858 $600,744 
Cost-to-cost percent complete65,605 298,654 
Point-in-time40,324 65,282 
 $1,165,787 $964,680 
b) Contract balances
NoteDecember 31, 2024December 31, 2023
Contract assets$4,135 $35,027 
Contract liabilities
Contract liabilities1,944 59 
Long-term contract liabilities (included in other long-term obligations)1519,027 16,114 
$20,971 $16,173 
The decrease in the contract assets balance reflects a shift in the Company's contracts with customers revenue recognition method away from cost-to-cost percent complete scopes and into as-invoiced scopes.
The Company recognized revenue of $59 in 2024 that was included in the contract liability balance as of December 31, 2023 ($1,411 in 2023 that was included in the contract balance as of December 31, 2022).
c) Performance obligations
The following table provides information about revenue recognized from performance obligations that were satisfied (or partially satisfied) in previous periods:
Year ended December 31,20242023
Revenue (derecognized) recognized $(8,377)$2,598 
These amounts relate to cumulative catch-up adjustments arising from changes in estimated cost of sales on cost-to-cost percent complete jobs and final settlement of constrained variable consideration. In 2024, final settlements of constrained variable consideration included $8,044 of previously recognized revenue that was derecognized as a result of negotiations with the client in exchange for securing a contract extension, and an additional $822 was derecognized upon final settlement of contractual amounts with another customer.
d) Transaction price allocated to the remaining performance obligations
The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period. Included is all consideration from contracts with customers, excluding amounts that are recognized using the as-invoiced method and any constrained amounts of revenue.
For the year ended December 31,
2025$174,758 
202652,930 
$227,688 
e) Unapproved contract modifications
The Company recognized revenue from variable consideration related to unapproved contract modifications for the year ended December 31, 2024, of $nil (year ended December 31, 2023 - $8,032). The Company has recorded amounts in current assets related to uncollected consideration from revenue recognized on unapproved contract modifications as at December 31, 2024, of $nil (December 31, 2023 - $9,482). In 2024, final settlements of unapproved contract modifications included $8,044 of previously recognized revenue that was derecognized as a result of negotiations with the client in exchange for securing a contract extension, and an additional $822 was derecognized upon final settlement of contractual amounts with another customer.