Note 4 - Intangible Assets (Tables)

12 Months Ended

Mar. 31, 2026

Notes Tables

Intangible Asset, Finite-Lived [Table Text Block]

		March 31, 2026																	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			$	(29,959	)		$	5,835			$	35,794			10	-	15			$	(27,982	)		$	7,812
Software		$	14,515				3				$	(12,100	)		$	2,415			$	14,515				3				$	(7,260	)		$	7,255

		$	50,309								$	(42,059	)		$	8,250			$	50,309								$	(35,242	)		$	15,067

Intangible Asset, Finite-Lived, and Capitalized Cost, Software to be Sold, Leased, or Marketed, Estimated Amortization Expense [Table Text Block]

For the fiscal years ended March 31,
2027		$	4,140
2028			1,724
2029			1,551
2030			835

		$	8,250