Note 5 - Intangible Assets

12 Months Ended

Mar. 31, 2018

Notes to Financial Statements

Intangible Assets Disclosure [Text Block]

NOTE

5

- INTANGIBLE ASSETS

Intangible assets are being amortized using the straight line method over periods ranging from

3

-

15

years with a weighted average remaining life of approximately

7

years.

	March 31, 2018									March 31, 2017
	Cost		Weighted Average Amortization Period (years)		Accumulated Amortization			Net Carrying Amount		Cost		Weighted Average Amortization Period (years)		Accumulated Amortization			Net Carrying Amount
Patents & Trademarks	$	20,934		15	$	(10,639	)	$	10,295	$	20,934		15	$	(9,244	)	$	11,690

Amortization expense was

$1,395

for each of the years ended

March 31, 2018

and

2017.

Estimated aggregate future amortization expense related to intangible assets is as follows:

For the fiscal years ended March 31,:
2019	$	1,395
2020		1,395
2021		1,395
2022		1,395
2023		1,395
Thereafter		3,320
	$	10,295