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Revenue | 12 Months Ended
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Dec. 31, 2022
Revenue from Contract with Customer [Abstract] |
Revenue | Revenue a) Disaggregation of revenue
Year ended December 31, |  | 2022 |  | 2021
Revenue by source |  |  |  |
Operations support services |  | $ | 688,734 |  |  | $ | 600,308 |
Equipment and component sales |  | 48,728 |  |  | 28,603 |
Construction services |  | 32,077 |  |  | 25,232 |
|  | $ | 769,539 |  |  | $ | 654,143 |
By commercial terms |  |  |  |
Time-and-materials |  | $ | 523,468 |  |  | $ | 388,998 |
Unit-price |  | 234,047 |  |  | 253,840 |
Lump-sum |  | 12,024 |  |  | 11,305 |
|  | $ | 769,539 |  |  | $ | 654,143 |
Revenue recognition method |  |  |  |
As-invoiced |  | $ | 522,415 |  |  | $ | 407,496 |
Cost-to-cost percent complete |  | 198,396 |  |  | 218,044 |
Point-in-time |  | 48,728 |  |  | 28,603 |
|  | $ | 769,539 |  |  | $ | 654,143 |
b) Contract balances Contract assets:
Year ended December 31, |  | 2022 |  | 2021
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 period |  | 10,062 |  |  | 8,838 |
Increases as a result of work completed, but not yet an unconditional right to consideration |  | 1,767 |  |  | 921 |
Balance, end of year |  | $ | 15,802 |  |  | $ | 9,759 |
Contract liabilities:
Year ended December 31, |  | 2022 |  | 2021
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 period |  | 1,411 |  |  | 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, |  | 2022 |  | 2021
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, 2022 |  | December 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).

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI https://asc.fasb.org/topic&trid=49130388 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130556-203045 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130550-203045 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 15 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130558-203045 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130554-203045 + Details
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