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Summary of Significant Accounting Policies (Tables)

12 Months Ended

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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