Note 9 - Stockholders' Equity (Tables)

6 Months Ended

Sep. 30, 2025

Notes Tables

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

				Weighted-
				Average
				Exercise
	Number of			Price per
	Shares			Share
Outstanding as of March 31, 2025		14,000		$	15.10
Granted		-		$	-
Exercised		-		$	-
Forfeited or expired		(1,500	)	$	50.60
Outstanding as of September 30, 2025		12,500		$	10.80
Exercisable as of September 30, 2025		12,500		$	10.80

Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

	Number of
	Shares
Outstanding as of March 31, 2025		3,834
Granted		175,000
Vested		(2,500	)
Forfeited		(1,334	)
Outstanding as of September 30, 2025		175,000

	Number of
	Shares
Nonvested as of March 31, 2025		232,350
Granted		850,000
Vested		(107,750	)
Forfeited or expired		(75,000	)
Nonvested as of September 30, 2025		899,600