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Revenue | 12 Months Ended
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Dec. 31, 2023
Revenue from Contract with Customer [Abstract] |
Revenue | Revenue a) Disaggregation of revenue
Year ended December 31, |  | 2023 |  | 2022
Revenue by source |  |  |  |
Operations support services |  | $ | 886,963 |  |  | $ | 688,734 |
Equipment and component sales |  | 57,822 |  |  | 48,728 |
Construction services |  | 12,435 |  |  | 32,077 |
|  | $ | 957,220 |  |  | $ | 769,539 |
By commercial terms |  |  |  |
Time-and-materials |  | $ | 575,608 |  |  | $ | 523,468 |
Unit-price |  | 363,979 |  |  | 234,047 |
Lump-sum |  | 17,633 |  |  | 12,024 |
|  | $ | 957,220 |  |  | $ | 769,539 |
Revenue recognition method |  |  |  |
As-invoiced |  | $ | 600,744 |  |  | $ | 522,415 |
Cost-to-cost percent complete |  | 298,654 |  |  | 198,396 |
Point-in-time |  | 57,822 |  |  | 48,728 |
|  | $ | 957,220 |  |  | $ | 769,539 |
b) Contract balances
| Note |  | December 31, 2023 |  | December 31, 2022
Contract assets |  |  | $ | 35,027 |  |  | $ | 15,802 |
Contract liabilities |  |  | 59 |  |  | 1,411 |
Long-term contract liabilities | 14 |  | 16,114 |  |  | — |
Contract assets include unbilled amounts representing revenue recognized from work performed where the Company does not yet have an unconditional right to compensation. These balances generally relate to revenue accruals on contracts where the percentage of completion method of revenue recognition requires an accrual over what has been billed and revenue recognized from variable consideration related to unapproved contract modifications. Contract liabilities consist of advance payments and billings in excess of costs incurred and estimated earnings on uncompleted contracts. Long-term contract liabilities (included in other long-term obligations) includes upfront payments for long-term contracts to assist with operations scaling. The Company recognized revenue of $1,411 in 2023 that was included in the contract liability balance as of December 31, 2022 ($3,349 in 2022 that was included in the contract balance as of December 31, 2021). 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, |  | 2023 |  | 2022
Revenue recognized (derecognized) |  | $ | 2,598 |  |  | $ | (1,201) |
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. d) 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 $22,797, all of which is expected to be recognized in 2024. 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. e) Unapproved contract modifications The Company recognized revenue from variable consideration related to unapproved contract modifications for the year ended December 31, 2023, of $8,032 (year ended December 31, 2022 - $nil). The Company has recorded amounts in current assets related to uncollected consideration from revenue recognized on unapproved contract modifications as at December 31, 2023, of $9,482 (December 31, 2022 - $1,487).

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-9 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-10 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-15 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-12 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-13 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Topic 606 -Publisher FASB -URI https://asc.fasb.org//606/tableOfContent + Details
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