4. Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2018

Revenue Recognition Tables Abstract

Disaggregation of Revenue

Sales of products for the three and six month periods ended June 30, 2018 and 2017 were as follows:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
Antimony	$	1,492,520	$	2,077,300	$	3,174,333	$	4,063,808
Zeolite		682,534		616,414		1,373,240		1,228,426
Precious metals		81,293		144,766		141,703		165,577
	$	2,256,347	$	2,838,480	$	4,689,276	$	5,457,811

The following is sales information by geographic area based on the location of customers for the three and six month periods ended June 30, 2018 and 2017:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
United States	$	1,878,244	$	2,653,227	$	4,125,935	$	4,950,282
Canada		378,103		185,253		563,341		507,529
	$	2,256,347	$	2,838,480	$	4,689,276	$	5,457,811

Sales of products to significant customers

Sales of products to significant customers were as follows for the three and six month periods ended June 30, 2018 and 2017:

	For the Three Months Ended						For the Six Months Ended
	June 30, 2018			June 30, 2017			June 30, 2018			June 30, 2017
Mexichem Speciality Compounds	$	669,103		$	769,998		$	1,397,681		$	1,556,423
East Penn Manufacturing Inc.		-			363,979			-			512,621
Kohler Corporation		334,778			501,320			651,550			946,498
Ampacet Corporation		146,118			-			330,260			-
ZEO, Inc.		185,730			-			306,701			-
	$	1,335,729		$	1,635,297		$	2,686,192		$	3,015,542
% of Total Revenues		59.20	%		57.60	%		57.30	%		55.30	%

Accounts receivable from largest customers were as follows for June 30, 2018 and December 31, 2017:

	June 30, 2018			December 31, 2017
Nutreco Canada, Inc.	$	-		$	25,657
Ralco Mix Products		-			16,000
Mexichem Speciality Compounds		148,211			-
Axens North America, Inc.		38,404			-
Teck American, Inc.		82,733			241,627
	$	269,348		$	283,284
% of Total Receivables		58.40	%		78.10	%