Shareholders' Equity (Tables)

12 Months Ended

Mar. 31, 2021

Stockholders' Equity Note [Abstract]

Summary of assumptions for employee stock options

As of March 31, 2021, $73,000 of total unrecognized compensation costs related to nonvested stock is expected to be recognized over a period of five years. The assumptions for employee stock options are summarized as follows:

Years Ended	March 31, 2021		March 31, 2020
Risk-free interest rate		0.3% to 0.4%		1.2% to 2.4%
Expected life (in years)		5.0		5.0
Expected volatility		87%		87% to 89%
Expected dividend		0%		0%

Summary of stock option activity and related information for equity compensation plans

A summary of our stock option activity and related information for equity compensation plans approved by security holders for each of the fiscal years ended March 31, 2021 and 2020 is as follows:

	STOCK OPTIONS OUTSTANDING
	Number Outstanding			Weighted-Average Exercise Price per Share
BALANCE AT MARCH 31, 2019	672,000		$	0.43
Granted	185,000			0.42
Forfeited/expired	(103,000	)		0.71
BALANCE AT MARCH 31, 2020	754,000		$	0.39
Granted	110,000			0.54
Forfeited/expired	(72,000	)		0.51
BALANCE AT MARCH 31, 2021	792,000		$	0.40

Summary of RSU activity and related information for equity compensation plans

A summary of our stock option activity and related information for equity compensation plans not approved by security holders for the fiscal year ended March 31, 2021 is as follows:

	STOCK OPTIONS OUTSTANDING
	Number Outstanding			Weighted-Average Exercise Price per Share
BALANCE AT MARCH 31, 2019	294,000		$	0.49
Forfeited/expired	(50,000	)		0.36
BALANCE AT MARCH 31, 2020	244,000		$	0.52
Forfeited/expired	0			0.00
BALANCE AT MARCH 31, 2021	244,000		$	0.52

Summary of information about employee stock options outstanding and exercisable

The following table summarizes information about employee stock options outstanding and exercisable at March 31, 2021:

	STOCK OPTIONS OUTSTANDING				STOCK OPTIONS EXERCISABLE
Range of Exercise Prices	Number Outstanding	Weighted-Average Remaining Contractual Life (in Years)		Weighted-Average Exercise Price per Share	Number Exercisable		Weighted-Average Exercise Price per Share
$0.30 - $0.35	550,000	2.3	$	0.33	341,878	$	0.32
$0.38 - $0.50	431,000	2.2	$	0.43	226,056	$	0.42
$0.54 - $0.67	55,000	4.9	$	0.59	7,700	$	0.55
	1,036,000	2.4	$	0.39	575,634	$	0.36