Note 9 - Share-based Compensation (Tables)

12 Months Ended

Mar. 31, 2018

Notes Tables

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

	As of March 31, 201 8
	Authorized		Available		Outstanding
2016 Plan		1,300,000		1,131,992		159,675
2014 Directors Plan		350,000		231,623		12,000
2005 Plan		—		—		445,400
2004 Directors Plan		—		—		12,000
Total		1,650,000		1,363,615		629,075

Share-based Compensation, Stock Options, 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, 2015		1,433,216		$	4.08		6.4	$	6,221,909
Granted		6,000			5.91
Exercised		(21,800	)		3.26
Forfeited		(732,416	)		3.59
Outstanding at March 31, 2016		685,000		$	4.65		5.7	$	566,323
Granted		6,000			4.08
Exercised		(18,000	)		2.77
Forfeited		(170,000	)		6.44
Outstanding at March 31, 2017		503,000		$	4.10		4.7	$	145,946
Granted		120,000			3.53
Exercised		(29,150	)		2.59
Forfeited		(3,700	)		4.50
Expired		(750	)		1.60
Outstanding at March 31, 2018		589,400		$	4.06		4.9	$	675,300
Exercisable at March 31, 2018		469,400		$	4.20		3.8	$	486,900

Schedule of Nonvested Share Activity [Table Text Block]

Nonvested Options	Shares			Weighted Average Grant-Date Fair Value
Nonvested at March 31, 2017		19,500		$	2.93
Granted		120,000			1.81
Vested		(19,500	)		2.93
Nonvested at March 31, 2018		120,000		$	1.81

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

			Outstanding Options						Exercisable Options
Range of Exercise Prices			Number of Shares		Remaining Life (Years)		Weighted Average Exercise Price		Number of Shares		Weighted Average Exercise Price
$1.60	-	$3.70		172,200		5.3	$	3.05		97,200	$	2.81
$3.71	-	$4.42		239,700		4.7	$	3.83		194,700	$	3.83
$4.43	-	$5.40		95,000		5.2	$	5.00		95,500	$	5.00
$5.41	-	$7.08		82,500		4.6	$	5.77		82,500	$	5.77
Total stock options				589,400		4.9	$	4.06		469,400	$	4.20

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	201 8			201 7			201 6
Exercise Price	$	3.83		$	4.08		$	5.91
Volatility		51.91	%		51.13	%		50.00	%
Risk Free Rate		2.50	%		0.60	%		0.22	%
Vesting Period (in years)		3.0			0.5			0.5
Forfeiture Rate		0.00	%		0.00	%		0.00	%
Expected Life (in years)		6.00			1.00			1.00
Dividend Rate		0	%		0	%		0	%

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, 2017		25,000		$	3.85
Granted		28,074		$	3.92
Vested		(8,333	)	$	3.85
Exercised		—		$	—
Forfeited		(5,066	)	$	3.92
Nonvested restricted stock units at March 31, 2018		39,675		$	3.89