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Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2019
Accounting Policies [Abstract] |
Depreciation Expense Excluded From Each Line Item in Consolidated Statements of Operations | The following table summarizes depreciation and finance lease amortization expense excluded from each line item in our condensed consolidated statements of operations (in thousands):
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2019 |  | 2018 |  | 2019 |  | 2018
Cost of revenues |  | $ | 4,763 |  |  | $ | 1,620 |  |  | $ | 12,579 |  |  | $ | 4,866 |
Operating expense |  | 13,630 |  |  | 7,155 |  |  | 40,212 |  |  | 20,560 |
General and administrative expense |  | 797 |  |  | 1,297 |  |  | 2,341 |  |  | 3,345 |

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