Note 5 - Intangible Assets (Details) - Intangible Assets (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Cost	$ 168,148	$ 168,148
Weighted average amortization period (years)	7 years 146 days
Accumulated amortization	(116,061)	(113,398)
Net carrying amount	52,087	54,750
Patents and Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	82,702	82,702
Weighted average amortization period (years)	15 years	15 years
Accumulated amortization	(64,822)	(64,369)
Net carrying amount	17,880	18,333
Formulas [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	25,446	25,446
Weighted average amortization period (years)	15 years	15 years
Accumulated amortization	(6,715)	(6,291)
Net carrying amount	18,731	19,155
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	50,000	50,000
Weighted average amortization period (years)	7 years	7 years
Accumulated amortization	(34,524)	(32,738)
Net carrying amount	15,476	17,262
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	10,000	10,000
Weighted average amortization period (years)	3 years	3 years
Accumulated amortization	$ (10,000)	$ (10,000)