Note 5 - Intangible Assets (Tables)

9 Months Ended

Dec. 31, 2012

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	December 31, 2012								March 31, 2012
	Cost		Weighted Average Amortization Period (years)	Accumulated Amortization			Net Carrying Amount		Cost		Weighted Average Amortization Period (years)	Accumulated Amortization			Net Carrying Amount
Patents & Trademarks	$	82,702	15	$	(63,916	)	$	18,786	$	82,702	15	$	(62,464	)	$	20,238
Formulas		25,446	15		(6,020	)		19,426		25,446	15		(4,595	)		20,851
Non-Compete Agreement		50,000	7		(30,952	)		19,048		50,000	7		(25,595	)		24,405
Customer List		10,000	3		(10,000	)		-		10,000	3		(9,028	)		972
	$	168,148		$	(110,888	)	$	57,260	$	168,148		$	(101,682	)	$	66,466

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

2013	$	2,512
2014		10,650
2015		10,601
2016		5,890
2017		2,914
Thereafter		24,693
	$	57,260