Note 7 - Stock Based Compensation - Restricted Stock Activity (Details) - Restricted Stock Units (RSUs) [Member]	3 Months Ended
	Jun. 30, 2025 $ / shares shares
Unvested (in shares) | shares	18,026
Unvested, grant date fair value per share (in dollars per share) | $ / shares	$ 7.07
Cancelled or forfeited (in shares) | shares	0
Cancelled or forfeited, grant date fair value per share (in dollars per share) | $ / shares	$ 0
Granted (in shares) | shares	89,534
Granted, grant date fair value per share (in dollars per share) | $ / shares	$ 14.39
Vested (in shares) | shares	(14,000)
Vested, grant date fair value per share (in dollars per share) | $ / shares	$ 4.32
Unvested (in shares) | shares	93,560
Unvested, grant date fair value per share (in dollars per share) | $ / shares	$ 14.49