4. Revenue Recognition

3 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Products consist of the following:

● Antimony: includes antimony oxide, sodium antimonate, antimony trisulfide, and antimony metal

● Zeolite: includes coarse and fine zeolite crushed in various sizes

● Precious Metals: includes unrefined and refined gold and silver

Sales of products for the three month period ended March 31, 2021 and 2020, were as follows:

	Three Months Ended
	March 31,
	2021		2020
Antimony	$	657,107	$	1,121,425
Zeolite		519,947		559,360
Precious metals		76,233		62,206
	$	1,253,287	$	1,742,991

The following is sales information by geographic area based on the location of customers for the three month period ended March 31, 2021 and 2020:

	Three Months Ended
	March 31,
	2021		2020
United States	$	1,165,513	$	1,566,237
Canada		87,774		176,754
	$	1,253,287	$	1,742,991

Sales of products to significant customers were as follows for the three month period ended March 31, 2021 and 2020:

Sales to Three	For the Period Ended
Largest Customers	March 31, 2021			March 31, 2020
Zeo Inc.	$	152,317		$	-
GE Chaplin, Inc.		298,150			114,291
Nyacol Technologies		-			106,161
Mexichem Speciality Compounds		327,670			413,993
	$	778,137		$	634,445
% of Total Revenues		62.09	%		36.40	%

Accounts receivable from largest customers were as follows at March 31, 2021 and December 31, 2020:

Largest
Accounts Receivable	March 31, 2021			December 31, 2020
Mexichem Speciality Compounds	$	185,804		$	-
GE Chaplin, Inc.		102,408			-
Earth Innovations Inc.		-			68,055
	$	288,212		$	68,055
% of Total Receivables		53.61	%		28.52	%

Our trade accounts receivable balance related to contracts with customers was $537,567 at March 31, 2021 and $238,634 at December 31, 2020. Our products do not involve any warranty agreements and product returns are not typical.