Note 4 - Intangible Assets

6 Months Ended

Sep. 30, 2025

Notes to Financial Statements

Intangible Assets Disclosure [Text Block]

NOTE 4 - INTANGIBLE ASSETS

	September 30, 2025											March 31, 2025
	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	$	(29,027	)	$	6,767	$	35,794		10	-	15	$	(27,982	)	$	7,812
Software	$	14,515		3			$	(9,680	)	$	4,835	$	14,515		3			$	(7,260	)	$	7,255
	$	50,309					$	(38,707	)	$	11,602	$	50,309					$	(35,242	)	$	15,067

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

For the fiscal years ended March 31,
2026	$	3,353
2027		4,139
2028		1,724
2029		1,551
2030		835
	$	11,602