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Business Acquisitions and Related Transactions (Tables) | 12 Months Ended
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Dec. 31, 2018
Business Combinations [Abstract] |
Schedule of Purchase Price Allocation by Acquisitions | A summary of the cumulative consideration paid and the allocation of the purchase price of all of the acquisitions in each respective year is as follows:
| 2018 | 2017 | 2016
Accounts receivable | $ | 1,015 |  | $ | — |  | $ | — |
Prepaid expenses and other current assets | 12 |  | 256 |  | 263 |
Property and equipment and energy assets | — |  | 7,788 |  | 12,815 |
Intangibles | 680 |  | — |  | — |
Goodwill | 2,845 |  | — |  | — |
Accounts payable | 67 |  | — |  | — |
Purchase price | $ | 4,619 |  | $ | 8,044 |  | $ | 13,078 |
Total, net of cash received | $ | 4,619 |  | $ | 8,044 |  | $ | 13,078 |
Debt assumed | $ | — |  | $ | 5,635 |  | $ | 9,503 |
Total fair value of consideration | $ | 4,619 |  | $ | 2,409 |  | $ | 3,575 |

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- Definition Tabular disclosure of a material business combination completed during the period, including background, timing, and recognized assets and liabilities. This table does not include leveraged buyouts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1486-128463 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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