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Revenue
 12 Months Ended
Dec. 31, 2022
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
a) Disaggregation of revenue
Year ended December 31,20222021
Revenue by source
Operations support services$688,734 $600,308 
Equipment and component sales48,728 28,603 
Construction services32,077 25,232 
 $769,539 $654,143 
By commercial terms
Time-and-materials$523,468 $388,998 
Unit-price234,047 253,840 
Lump-sum12,024 11,305 
 $769,539 $654,143 
Revenue recognition method
As-invoiced$522,415 $407,496 
Cost-to-cost percent complete198,396 218,044 
Point-in-time48,728 28,603 
 $769,539 $654,143 
b) Contract balances
Contract assets:
Year ended December 31,20222021
Balance, beginning of year$9,759 $7,008 
Transferred to receivables from contract assets recognized at the beginning of the period(5,786)(7,008)
Increases as a result of changes to the estimate of the stage of completion, excluding amounts transferred in the period10,062 8,838 
Increases as a result of work completed, but not yet an unconditional right to consideration1,767 921 
Balance, end of year$15,802 $9,759 
Contract liabilities:
Year ended December 31,20222021
Balance, beginning of year$3,349 $1,512 
Revenue recognized that was included in the contract liability balance at the beginning of the period(3,349)(899)
Increases due to cash received, excluding amounts recognized as revenue during the period1,411 2,736 
Balance, end of year$1,411 $3,349 
The following table provides information about revenue recognized from performance obligations that were satisfied (or partially satisfied) in previous periods:
Year ended December 31,20222021
Revenue (derecognized) recognized$(1,201)$3,572 
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.
During the year-ended December 31, 2022, the Company derecognized $3,706 in revenue recognized in the year-ended December 31, 2021, and $3,706 in contract assets recognized as at December 31, 2021, due to a customer directed change of scope in a project. This resulted in the work ultimately being completed under the as-invoiced method of revenue recognition rather than the cost-to-cost percentage method. During the year-ended December 31, 2022, the Company recognized revenue of $177,620 related to this project.
c) Transaction price allocated to the remaining performance obligations
The 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 is $52,526, all of which is expected to be recognized in 2023. Included is all expected consideration from contracts with customers, excluding amounts that are recognized using the as-invoiced method and any constrained amounts of revenue.
d) Contract costs
The following table summarizes contract costs included within other assets on the Consolidated Balance Sheets.
 December 31, 2022December 31, 2021
Fulfillment costs$— $2,673 
During the year ended December 31, 2022, fulfillment costs of $nil were capitalized and $2,673 were amortized within cost of sales on the Consolidated Statement of Operations and Comprehensive income (December 31, 2021 - $2,909 and $1,668, respectively).