Note 4 - Intangible Assets (Tables)

9 Months Ended

Dec. 31, 2025

Notes Tables

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

		December 31, 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			$	(29,499	)		$	6,295			$	35,794				10	-	15			$	(27,982	)		$	7,812
Software		$	14,515				3					$	(10,890	)		$	3,625			$	14,515				3					$	(7,260	)		$	7,255

		$	50,309									$	(40,389	)		$	9,920			$	50,309									$	(35,242	)		$	15,067

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

For the fiscal years ended March 31,
2026		$	1,670
2027			4,139
2028			1,724
2029			1,551
2030			836

		$	9,920