Note 10 - Share-based Compensation (Tables)

6 Months Ended

Sep. 30, 2020

Notes Tables

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

	As of September 3 0 , 20 20
	Authorized		Available		Outstanding
2016 Plan		1,300,000		1,065,358		176,688
2014 Directors Plan		350,000		43,133		12,000
2005 Plan		—		—		235,300
2004 Directors Plan		—		—		12,000
Total		1,650,000		1,108,491		435,988

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, 2020		318,300		$	4.08		3.0	$	—
Granted		130,000		$	2.35
Exercised		—		$	—
Forfeited		(41,500	)	$	3.16
Outstanding at September 30, 2020		406,800		$	3.62		4.4	$	17,950
Exercisable at September 30, 2020		281,800		$	4.19		1.9	$	1,950

Schedule of Nonvested Share Activity [Table Text Block]

Nonvested Options	Shares			Weighted Average Grant-Date Fair Value
Nonvested at March 31, 2020		37,500		$	1.52
Granted		130,000			1.20
Vested		(5,000	)		1.27
Forfeited		(37,500	)		1.52
Nonvested at September 30, 2020		125,000		$	1.19

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, 2020		12,766		$	3.98
Granted		28,647			2.15
Vested		(9,135	)		3.97
Forfeited		(3,090	)		2.26
Nonvested restricted stock units at September 30, 2020		29,188		$	2.37