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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Dec. 31, 2020

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,
						2021												2020												2019
						Revenue						Percentage of Total Revenue						Revenue						Percentage of Total Revenue						Revenue						Percentage of Total Revenue
Sand sales revenue						$	117,402					93		%				$	70,902					58		%				$	109,621					47		%
Shortfall revenue						4,421						3		%				23,281						19		%				49,259						21		%
Logistics revenue						4,824						4		%				28,157						23		%				74,193						32		%
Total revenues						$	126,647					100		%				$	122,340					100		%				$	233,073					100		%

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

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,
			2021						2020						2019
Weighted average common shares outstanding			41,775						40,260						40,135
Assumed conversion of restricted stock			—						—						202
Diluted weighted average common stock outstanding			41,775						40,260						40,337

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

The following table reflects the changes in the net carrying amounts of the Company’s intangible assets for the year ended December 31, 2021.

						Balance at December 31, 2020						Assets Acquired Pursuant to Business Combination						Impairment Charges						Amortization Expense						Balance at December 31, 2021
Developed technology						$	8,253					$	—					$	—					$	792					$	7,461
						$	8,253					$	—					$	—					$	792					$	7,461

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, 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 carrying amounts of the Company's finite-lived intangible assets at December 31, 2021 and 2020.

						December 31, 2021												December 31, 2020
						Gross Carrying Amount						Accumulated Amortization						Gross Carrying Amount						Accumulated Amortization
Developed technology						$	10,300					$	(2,839)					$	10,300					(2,047)
						$	10,300					$	(2,839)					$	10,300					$	(2,047)

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