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Energy Assets, Net - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Business Acquisition [Line Items] |  |  |  |  |
Cost of revenues | $ 10,450 | $ 9,650 | $ 20,136 | $ 18,949 |
Capitalized interest | 1,288 | 912 | 3,526 | 1,774 |
ARO assets, net | 2,004 |  | 2,004 |  | $ 1,468
ARO liabilities, current | 6 |  | 6 |  | 86
ARO liabilities, non-current | 2,284 |  | 2,284 |  | 1,561
Total ARO liabilities | 2,290 |  | 2,290 |  | $ 1,647
Depreciation expense of ARO assets |  |  | 1,637 | 1,659 |
Accretion expense of ARO liabilities | 33 | 22 | 57 | 43 |
ARO Asset |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Depreciation expense of ARO assets | $ 30 | $ 19 | $ 53 | $ 38 |

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