8. Stock-Based Compensation (Tables)

9 Months Ended

Dec. 31, 2019

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

Share-based compensation expense

	Three Months				Nine Months
	Ended				Ended
	December 31,				December 31,
	2019		2018		2019		2018
Cost of service revenue	$	17,000	$	24,000	$	51,000	$	89,000
Research and development		19,000		26,000		60,000		87,000
Selling, general and administrative		76,000		352,000		426,000		1,099,000
Total stock-based compensation	$	112,000	$	402,000	$	537,000	$	1,275,000

Schedule of option activity

	Number of Shares			Weighted- Average Exercise Price		Weighted- Average Contractual Term		Aggregate Intrinsic Value
Outstanding at April 1, 2019		165,000		$	72.88		–		–
Options granted		268,000			4.36		–		–
Options exercised		–			–		–		–
Options forfeited		(7,000	)		32.07		–		–
Options expired		(68,000	)		36.61		–		–
Outstanding at December 31, 2019		358,000		$	29.27		8.96	$	–
Exercisable at December 31, 2019		77,000		$	111.48		5.61	$	–

Restricted Stock Award Activity

	Number of Shares			Weighted Average Award Date Fair Value per Share
Unvested restricted stock awards outstanding at April 1, 2019		4,000		$	27.96
Restricted stock awards granted		–			–
Restricted stock awards vested		(2,000	)		39.02
Restricted stock awards forfeited		–			–
Unvested restricted stock awards outstanding at December 31, 2019		2,000		$	13.68