4. Revenue Recognition (Details 1) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Sales to three largest customers	$ 634,445	$ 1,299,433
Total percentage of revenue	36.40%	52.90%
Accounts receivable of three largest customers	$ 115,921		$ 103,757
Total percentage of accounts receivable	50.47%		36.48%
Kohler Corporation
Sales to three largest customers	$ 0	$ 458,094
GE Chaplin, Inc.
Sales to three largest customers	114,291	0
Nyacol Nanotechnologies
Sales to three largest customers	106,161	0
East Penn Manufacturing
Sales to three largest customers	0	157,328
Mexichem Speciality Compounds
Sales to three largest customers	413,993	$ 684,011
Nutreco Canada Inc.
Accounts receivable of three largest customers	20,452		$ 21,219
Ralco Mix Products
Accounts receivable of three largest customers	16,600		0
Lake Shore Gold
Accounts receivable of three largest customers	0		27,854
Teck North America Inc.
Accounts receivable of three largest customers	78,869		0
Commerce Industrial Chemical
Accounts receivable of three largest customers	$ 0		$ 54,684