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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

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,
						2020												2019												2018
						Revenue						Percentage of Total Revenue						Revenue						Percentage of Total Revenue						Revenue						Percentage of Total Revenue
Sand sales revenue						$	70,902					58		%				$	109,621					47		%				$	143,533					68		%
Shortfall revenue						23,281						19		%				49,259						21		%				6,032						3		%
Logistics revenue						28,157						23		%				74,193						32		%				62,905						30		%
Total revenues						$	122,340					100		%				$	233,073					100		%				$	212,470					101		%

Schedule Of Useful Life Property Plant And Equipment

Depreciation is calculated using the straight-line method over the estimated useful lives of the property, plant and equipment, which are:

			Years
Land improvements			10
Plant and buildings			5-15
Real estate properties			10-40
Railroad and sidings			30
Vehicles			3-5
Machinery, equipment and tooling			3-15
SmartSystems			5-15
Furniture and fixtures			3-10
Deferred mining costs			3

Schedule of contingent consideration

The fair value of the Company’s financial instruments carried at fair value were as follows:

						December 31, 2020						Level 1						Level 2						Level 3
Contingent consideration						$	180					$	—					$	—					$	180
Total liabilities						$	180					$	—					$	—					$	180

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, 2020:

Balance as of December 31, 2019						$	1,900
Payment of contingent consideration						(310)
Fair value adjustment						(1,410)
Balance as of December 31, 2020						$	180

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,
			2020						2019						2018
Weighted average common shares outstanding			40,260						40,135						40,427
Assumed conversion of restricted stock			—						202						22
Diluted weighted average common stock outstanding			40,260						40,337						40,449

Schedule of finite-lived intangible assets

Acquired finite-lived intangible assets are amortized on a straight-line basis over the following periods:

						Estimated Useful Life (Years)
Developed technology						13

In 2020, the Company recorded an impairment loss of $5,115 to fully write down the value of its long-lived assets in the Permian basin as it has no intentions to develop these properties in the foreseeable future.

The following table reflects the changes in the net carrying amounts of the Company’s intangible assets for the year ended December 31, 2020.

						Balance at December 31, 2019						Assets Acquired Pursuant to Business Combination						Impairment Charges						Amortization Expense						Balance at December 31, 2020
Developed technology						$	9,046					$	—					$	—					$	793					$	8,253
						$	9,046					$	—					$	—					$	793					$	8,253

The following table reflects the changes in the net carrying amounts of the Company’s finite-lived intangible assets for the year ended December 31, 2019.

						Balance at December 31, 2018						Assets Acquired Pursuant to Business Combination						Impairment Charges						Amortization Expense						Balance at December 31, 2019
Developed technology						$	17,956					$	—					$	7,628					$	1,282					$	9,046
Customer relationships						112						—						—						112						—
						$	18,068					$	—					$	7,628					$	1,394					$	9,046

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