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15. Commitments and Contingencies | 12 Months Ended
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Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |
Commitments and Contingencies | The Company pays various royalties on the sale of zeolite products. On a combined basis, royalties vary from 8%-13%. During the year ended December 31, 2020 and 2019, the Company had royalty expense of $224,875 and $266,388, respectively. At December 31, 2020 and 2019, the Company had accrued royalties payable of $434,981 and $280,314, respectively. The Company is currently in negotiations with certain royalty holders to modify the terms of the agreements.

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