Concentrations	12 Months Ended
Dec. 31, 2018
Risks and Uncertainties [Abstract]
Concentrations	Concentrations As of December 31, 2018, four customers accounted for 89% of the Company’s total accounts receivable. As of December 31, 2017, three customers accounted for 49% of the Company’s total accounts receivable. During the years ended December 31, 2018, 2017 and 2016, 66%, 72% and 96% of our revenues were earned from four customers, respectively. As of December 31, 2018, one vendor accounted for 16% of the Company’s accounts payable. As of December 31, 2017, two vendors accounted for 28% of the Company’s accounts payable. During the years ended December 31, 2018, 2017 and 2016, two suppliers accounted for 40%, 59% and 32% of the Company’s cost of goods sold, respectively. The Company’s sand inventory and mining operations are located in Wisconsin. There is a risk of loss if there are significant environmental, legal or economic changes to this geographic area. The Company currently primarily utilizes one third-party rail company to ship its products to customers from its plant. There is a risk of business loss if there are significant impacts to this third party’s operations.

Concentrations

12 Months Ended

Dec. 31, 2018

As of December 31, 2018, four customers accounted for 89% of the Company’s total accounts receivable. As of December 31, 2017, three customers accounted for 49% of the Company’s total accounts receivable.

During the years ended December 31, 2018, 2017 and 2016, 66%, 72% and 96% of our revenues were earned from four customers, respectively.

As of December 31, 2018, one vendor accounted for 16% of the Company’s accounts payable. As of December 31, 2017, two vendors accounted for 28% of the Company’s accounts payable.

During the years ended December 31, 2018, 2017 and 2016, two suppliers accounted for 40%, 59% and 32% of the Company’s cost of goods sold, respectively.

The Company’s sand inventory and mining operations are located in Wisconsin. There is a risk of loss if there are significant environmental, legal or economic changes to this geographic area.

The Company currently primarily utilizes one third-party rail company to ship its products to customers from its plant. There is a risk of business loss if there are significant impacts to this third party’s operations.