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Sale of investment in unconsolidated subsidiary - Additional Information (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jun. 24, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Jun. 29, 2021
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Success-based fee payment |  |  |  |  | $ 1,900
Gain (Loss) on Disposition of Stock in Subsidiary |  | $ 400 | $ 1,400 |  |
Gain from disposal of investment in unconsolidated subsidiary |  | 20,829 | $ 0 | $ 0 |
Business Combination Contingent Consideration Receivable |  | 14,000 |  |  |
Escrow released payment received |  | $ 200 |  |  |
Dimension [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Description |  | The sales agreement with Dimension includes an earnout provision which provides the potential to receive an additional contingent consideration of up to approximately $14.0 million through December 2024, based on Dimension achieving certain performance milestones. This potential earnout is calculated each quarter starting January 1, 2022, as $200 times the number of kilowatts constituting each Notice To Proceed (NTP) megawatt (MW) achieved during such quarterly earnout period, provided that no earnout amount is payable in respect to the first 100 NTP MW achieved in any earnout year.The sales agreement also includes a projects escrow release which is an additional contingent consideration to receive $7 million based on Dimension’s completion of certain construction projects currently in progress. |  |  |
Dimension Energy LLC |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Gain from disposal of investment in unconsolidated subsidiary |  | $ 20,800 |  |  |
Dimension Energy LLC | Common Class A |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Number of Share Disposed | 4,791,566 |  |  |  |
Ownership percentage | 23.00% |  |  |  |
Ownership value | $ 22,300 |  |  |  |

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