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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2019
Accounting Policies [Abstract] |
Schedule of disaggregated revenue | The following table presents the Company’s revenues disaggregated by type and percentage of total revenues for the periods indicated.
|  | Year Ended December 31, |  |  |  |  |  |  |  |  |  |
|  | 2019 |  |  |  | 2018 |  |  |  | 2017 |  |
|  | Revenue |  | Percentage of Total Revenue |  | Revenue |  | Percentage of Total Revenue |  | Revenue |  | Percentage of Total Revenue
Sand sales revenue |  | $ | 109,621 |  |  | 47 | % |  | $ | 143,533 |  |  | 67 | % |  | $ | 80,200 |  |  | 59 | %
Shortfall revenue |  | 49,259 |  |  | 21 | % |  | 6,032 |  |  | 3 | % |  | 1,244 |  |  | 1 | %
Logistics revenue |  | 74,193 |  |  | 32 | % |  | 62,905 |  |  | 30 | % |  | 55,768 |  |  | 40 | %
Total revenues |  | $ | 233,073 |  |  | 100 | % |  | $ | 212,470 |  |  | 100 | % |  | $ | 137,212 |  |  | 100 | %
Schedule of useful lives of property, plant and equipment | The acquisition cost has been allocated over the assets as set forth below.
Machinery, equipment and tooling | $ | 1,478 |
Plant and building | 1,407 |
Railroad and sidings | 9,926 |
Land improvements | 2,738 |
Total assets acquired | $ | 15,549 |
Net property, plant and equipment consists of:
| December 31, |  |
| 2019 |  | 2018
Machinery, equipment and tooling | $ | 19,683 |  |  | $ | 14,858 |
SmartSystems | 15,811 |  |  | 5,286 |
Vehicles | 2,419 |  |  | 1,955 |
Furniture and fixtures | 1,228 |  |  | 1,140 |
Plant and building | 170,283 |  |  | 158,882 |
Real estate properties | 4,946 |  |  | 4,601 |
Railroad and sidings | 27,701 |  |  | 27,347 |
Land and land improvements | 21,320 |  |  | 27,167 |
Asset retirement obligation | 11,480 |  |  | 16,469 |
Mineral properties | 7,442 |  |  | 10,075 |
Deferred mining costs | 2,004 |  |  | 1,806 |
Construction in progress | 9,208 |  |  | 21,619 |
| 293,525 |  |  | 291,205 |
Less: accumulated depreciation and depletion | 63,064 |  |  | 42,809 |
Total property, plant and equipment, net | $ | 230,461 |  |  | $ | 248,396 |
Schedule of contingent consideration | The fair value of the Company’s financial instruments carried at fair value were as follows:
|  | December 31, 2019 |  | Level 1 |  | Level 2 |  | Level 3
Contingent consideration |  | $ | 1,900 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,900 |
Total liabilities |  | $ | 1,900 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,900 |
Fair value, liabilities measured on recurring basis, unobservable input reconciliation | The following table provides a summary of changes in the fair value of the Company’s Level 3 financial instruments for the year ended December 31, 2019:
Balance as of December 31, 2018 |  | $ | 7,167 |
Payment of contingent consideration |  | (1,995) |
Fair value adjustment |  | (3,272) |
Balance as of December 31, 2019 |  | $ | 1,900 |
Reconciliation of weighted-average common shares outstanding used in the calculation of basic and diluted net income (loss) per share | The following table reconciles the weighted-average common shares outstanding used in the calculation of basic net income per share to the weighted average common shares outstanding used in the calculation of diluted net income per share:
| Year Ended December 31, |  |  |  |
| 2019 |  | 2018 |  | 2017
Weighted average common shares outstanding | 40,135 |  |  | 40,427 |  |  | 40,208 |
Assumed conversion of restricted stock | 202 |  |  | 22 |  |  | 96 |
Diluted weighted average common stock outstanding | 40,337 |  |  | 40,449 |  |  | 40,304 |

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