Note 4 - Intangible Assets

9 Months Ended

Dec. 31, 2022

Notes to Financial Statements

Intangible Assets Disclosure [Text Block]

NOTE 4 - INTANGIBLE ASSETS

Intangible assets are being amortized using the straight-line method over periods ranging from 10-15 years with a weighted average remaining life of approximately 6 years.

	December 31, 2022											March 31, 2022
	Cost		Weighted Average Amortization Period (Years)				Accumulated Amortization			Net Carrying Amount		Cost		Weighted Average Amortization Period (Years)				Accumulated Amortization			Net Carrying Amount
Patents & Trademarks	$	35,794		10	-	15	$	(21,911	)	$	13,883	$	35,794		10	-	15	$	(19,751	)	$	16,043

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

For the fiscal years ended March 31,
2023		721
2024		2,883
2025		2,466
2026		1,980
2027		1,725
Thereafter		4,108
	$	13,883