4. Revenue Recognition

3 Months Ended

Mar. 31, 2020

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 periods ended March 31, 2020 and 2019, were as follows:

	Three Months Ended
	March 31,
	2020		2019
Antimony	$	1,121,425	$	1,705,823
Zeolite		559,360		726,015
Precious metals		62,206		24,527
	$	1,742,991	$	2,456,365

The following is sales information by geographic area based on the location of customers for the three-month periods ended March 31, 2020 and 2019

	Three Months Ended
	March 31,
	2020		2019
United States	$	1,566,237	$	2,244,400
Canada		176,754		211,965
	$	1,742,991	$	2,456,365

Sales of products to significant customers were as follows for the three month periods ended March 31, 2020 and 2019:

Sales to Three	For the Period Ended
Largest Customers	March 31, 2020			March 31, 2019
Kohler Corporation	$	-		$	458,094
GE Chaplin, Inc.		114,291			-
Nyacol Technologies		106,161			-
East Penn Manufacturing		-			157,328
Mexichem Speciality Compounds		413,993			684,011
	$	634,445		$	1,299,433
% of Total Revenues		36.40	%		52.90	%

Accounts receivable from largest customers were as follows at March 31, 2020 and December 31, 2019:

Largest
Accounts Receivable	March 31, 2020			December 31, 2019
Nutreco Canada Inc.	$	20,452		$	21,219
Ralco Mix Products		16,600			-
Lake Shore Gold		-			27,854
Teck North America Inc.		78,869			-
Commerce Industrial Chemical		-			54,684
	$	115,921		$	103,757
% of Total Receivables		50.47	%		36.48	%

Our trade accounts receivable balance related to contracts with customers was $229,692 at March 31, 2020 and $284,453 at December 31, 2019. Our products do not involve any warranty agreements and product returns are not typical.