Note 5 - Intangible Assets - Intangible Assets (Details) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Amortization	$ (9,244)	$ (155,062)
Net Carrying Amount	11,690	13,086
Cost	20,934	168,148
Patents And Trademarks [Member]
Accumulated Amortization	(9,244)	(69,616)
Net Carrying Amount	11,690	13,086
Cost	$ 20,934	$ 82,702
Weighted Average Amortization Period (Year)	15 years	15 years
Formulas [Member]
Accumulated Amortization		$ (25,446)
Net Carrying Amount
Cost		$ 25,446
Weighted Average Amortization Period (Year)		15 years
Noncompete Agreements [Member]
Accumulated Amortization		$ (50,000)
Net Carrying Amount
Cost		$ 50,000
Weighted Average Amortization Period (Year)		7 years
Customer Lists [Member]
Accumulated Amortization		$ (10,000)
Net Carrying Amount
Cost		$ 10,000
Weighted Average Amortization Period (Year)		3 years