14. Stock-Based Compensation (Tables)

12 Months Ended

Mar. 31, 2019

Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]

Weighted-average assumptions of fair value of employee stock options

	Year Ended March 31,
	2019		2018
Fair value of the Company’s common stock on date of grant	$	10.71	$	61.02
Expected term		5.38 yrs		6.42 yrs
Risk-free interest rate		2.61%		2.04%
Dividend yield		0.00%		0.00%
Volatility		121.5%		120.8%
Fair value of options granted	$	9.00	$	53.73

Employee stock-based compensation expense

	Year Ended March 31,
	2019		2018
Cost of revenues	$	90,000	$	169,000
Research and development		107,000		159,000
Selling, general and administrative		1,379,000		2,082,000
Total stock-based compensation	$	1,576,000	$	2,410,000

Plan summary

			Unvested
Plan	Stock Options		Restricted Stock		Total
2006 Plan		10,000		–		10,000
2011 Plan		92,000		1,000		93,000
2016 Plan		19,000		3,000		22,000
Granted outside shareholder approved plans		44,000		–		44,000
		165,000		4,000		169,000
Stock-based awards available for grant as of March 31, 2019						343,000

Schedule of option activity

	Number of Shares			Weighted- Average Exercise Price		Weighted- Average Contractual Term		Aggregate Intrinsic Value
Outstanding at April 1, 2018		155,000		$	114.30
Options granted		73,000			10.71
Options exercised		–			–
Options forfeited		(7,000	)		60.48
Options expired		(56,000	)		108.00
Outstanding at March 31, 2019		165,000		$	72.81		7.48	$	107,000
Exercisable at March 31, 2019		80,000		$	124.02		5.68	$	–

Schedule of unvested restricted stock activity

	Number of Shares			Weighted Average Award Date Fair Value per Share
Unvested restricted stock awards outstanding at April 1, 2018		4,000		$	58.14
Restricted stock awards granted		2,000			17.10
Restricted stock awards vested		(2,000	)		53.46
Restricted stock awards forfeited		–			62.73
Unvested restricted stock awards outstanding at March 31, 2019		4,000		$	27.99