Note 6 - Intangible Assets - Intangible Assets (Details) - USD ($)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Patents And Trademarks [Member]
Cost	$ 82,702	$ 82,702
Weighted Average Amortization Period	15 years	15 years
Accumulated Amortization	$ (68,221)	$ (66,331)
Net Carrying Amount	14,481	16,371
Formulas [Member]
Cost	$ 25,446	$ 25,446
Weighted Average Amortization Period	15 years	15 years
Accumulated Amortization	$ (25,446)	$ (25,446)
Net Carrying Amount
Noncompete Agreements [Member]
Cost	$ 50,000	$ 50,000
Weighted Average Amortization Period	7 years	7 years
Accumulated Amortization	$ (50,000)	$ (50,000)
Net Carrying Amount
Customer Lists [Member]
Cost	$ 10,000	$ 10,000
Weighted Average Amortization Period	3 years	3 years
Accumulated Amortization	$ (10,000)	$ (10,000)
Net Carrying Amount
Cost	$ 168,148	$ 168,148
Weighted Average Amortization Period
Accumulated Amortization	$ (153,667)	$ (151,777)
Net Carrying Amount	$ 14,481	$ 16,371