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11. Significant Customers
12 Months Ended
Dec. 31, 2019
Risks and Uncertainties [Abstract]  
11. Significant Customers

Sales to the U.S. Government represented approximately 49.1% and 40.0% of the Company’s total sales for the years ended December 31, 2019 and 2018, respectively. These sales were primarily to the various government agencies, including those within the United States Department of Defense, the United States Forest Service, the United States Department of Interior, and the United States Department of Homeland Security.