Note 4 - Intangible Assets (Tables)

9 Months Ended

Dec. 31, 2023

Notes Tables

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

	December 31, 2023											March 31, 2023
	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	$	(24,791	)	$	11,003	$	35,794		10	-	15	$	(22,631	)	$	13,163
Software	$	14,515			3		$	(1,210	)	$	13,305	$	-					$	-		$	-
	$	50,309					$	(26,001	)	$	24,308	$	35,794					$	(22,631	)	$	13,163

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

For the fiscal years ended March 31,
2024	$	3,862
2025		7,115
2026		6,716
2027		2,931
2028		1,726
Thereafter		1,958
	$	24,308