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Energy Assets, Net | 6 Months Ended
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Jun. 30, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Energy Assets, Net | ENERGY ASSETS, NET Energy assets, net consisted of the following:
| June 30, 2021 |  | December 31, 2020
Energy assets (1) | $ | 1,044,288 |  |  | $ | 954,426 |
Less - accumulated depreciation and amortization | (245,679) |  |  | (225,048) |
Energy assets, net | $ | 798,609 |  |  | $ | 729,378 |
(1) Includes financing lease assets (see Note 6), capitalized interest and ARO assets (see tables below).
The following table sets forth our depreciation and amortization expense on energy assets, net of deferred grant amortization:
| Three Months Ended June 30, |  | Six Months Ended June 30,
Location | 2021 |  | 2020 |  | 2021 |  | 2020
Cost of revenues (2) | $ | 10,450 |  |  | $ | 9,650 |  |  | $ | 20,136 |  |  | $ | 18,949 |
(2) Includes depreciation and amortization on financing lease assets (see Note 6). |  |  |  |
The following table presents the interest costs relating to construction financing during the period of construction, which were capitalized as part of energy assets, net:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Capitalized interest | $ | 1,288 |  |  | $ | 912 |  |  | $ | 3,526 |  |  | $ | 1,774 |
The following tables sets forth information related to our Asset Retirement Obligations (“ARO”) assets and ARO liabilities:
| Location | June 30, 2021 |  | December 31, 2020
ARO assets, net | Energy assets, net | $ | 2,004 |  |  | $ | 1,468 |
ARO liabilities, current | Accrued expenses and other current liabilities | $ | 6 |  |  | $ | 86 |
ARO liabilities, non-current | Other liabilities | 2,284 |  |  | 1,561 |
Total ARO liabilities |  | $ | 2,290 |  |  | $ | 1,647 |
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Depreciation expense of ARO assets | $ | 30 |  |  | $ | 19 |  |  | $ | 53 |  |  | $ | 38 |
Accretion expense of ARO liabilities | $ | 33 |  |  | $ | 22 |  |  | $ | 57 |  |  | $ | 43 |

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