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4. Revenue Recognition (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues	$ 1,007,231	$ 1,787,934	$ 4,335,413	$ 6,516,582
Antimony
Revenues	477,273	1,080,871	2,509,183	4,294,281
Zeolite
Revenues	481,126	651,563	1,653,201	2,081,751
Precious Metals
Revenues	48,832	55,500	173,029	140,550
United States
Revenues	891,090	1,570,364	3,893,374	5,498,640
Canada
Revenues	116,141	217,570	442,039	544,350
Mexico
Revenues	$ 0	$ 0	$ 0	$ 473,592

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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