Note 9 - Share-based Compensation (Tables)

9 Months Ended

Dec. 31, 2024

Notes Tables

Schedule of Share-based Compensation Shares Authorized Available and Outstanding by Plan [Table Text Block]

	As of December 31, 2024
	Authorized		Available		Outstanding
2016 Plan		1,300,000		631,832		399,211
2024 Directors Plan		800,000		604,126		195,874
2014 Directors Plan		—		—		12,000
Total		2,100,000		1,235,958		607,085

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

Option Activity	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Outstanding at March 31, 2024		297,000		$	2.47		7.1	$	—
Granted		50,000			0.78
Expired		(25,000	)		2.57
Outstanding at December 31, 2024		322,000		$	2.20		6.9	$	—
Exercisable at December 31, 2024		222,000		$	2.64		6.0	$	—

Schedule of Nonvested Share Activity [Table Text Block]

Nonvested Options	Shares			Weighted Average Grant-Date Fair Value
Nonvested at March 31, 2024		125,000		$	1.16
Granted		50,000			0.15
Vested		(75,000	)		1.28
Nonvested at December 31, 2024		100,000		$	0.56

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

Nonvested Restricted Stock Units	Shares			Weighted Average Grant Price
Nonvested restricted stock units at March 31, 2024		130,820		$	1.23
Vested		(20,456	)		2.93
Forfeited		(21,153	)		0.89
Nonvested restricted stock units at December 31, 2024		89,211		$	0.92