Stockholders' Equity (Tables)

12 Months Ended

Mar. 31, 2020

Class Of Stock [Line Items]

Schedule of Stock-based Compensation Expense

Stock-based compensation expense for all stock awards consists of the following (in thousands):

	Year Ended March 31, 2020		Year Ended March 31, 2019
Research and development	$	111	$	911
General and administrative	$	3,997	$	4,282
Total	$	4,108	$	5,193

Fair Value of Employee Stock Options

The fair value of stock options was estimated at the grant date using the following weighted average assumptions:

	Year Ended March 31, 2020			Year Ended March 31, 2019
Dividend yield		—			—
Volatility		84.36	%		72.99	%
Risk-free interest rate		1.53	%		2.75	%
Expected life of options	6.00 years			6.00 years
Weighted average grant date fair value	$	0.23		$	0.84

Fair Value of Employee Stock Purchase Plan

The fair value of ESPP shares was estimated at the purchase period commencement date using the following weighted average assumptions:

	Year Ended March 31, 2020*			Year Ended March 31, 2019
Dividend yield		—			—
Volatility		43.69	%	43.7 - 80.2%
Risk-free interest rate		2.52	%	1.85 - 2.52%
Expected term	6 months			6 months
Grant date fair value	$	0.29		$ 0.29 - $0.45

*There were no participants in the ESPP for the purchase period September 1, 2019 – February 29, 2020 nor any participants in the ESPP for the current purchase period (beginning March 1, 2020).

Summary of Stock Option Activity

The following table summarizes stock option activity for the year ended March 31, 2020:

	Options Outstanding			Weighted- Average Exercise Price		Aggregate Intrinsic Value
Outstanding at March 31, 2019		12,039,264		$	2.24	$	—
Options granted		342,500		$	0.32	$	—
Options canceled		(4,743,688	)	$	2.35	$	—
Options exercised		—		$	—	$	—
Outstanding at March 31, 2020		7,638,076		$	2.08	$	37,440
Vested and Exercisable at March 31, 2020		4,184,674		$	2.53	$	—

Summary of Warrant Activity

The following table summarizes warrant activity for the year ended March 31, 2020:

	Warrants			Weighted-Average Exercise Price
Balance at March 31, 2019		145,000		$	7.11
Granted		—		$	—
Expired / Canceled		(145,000	)	$	7.11
Exercised		—		$	—
Balance at March 31, 2020		—		$	—

Common Stock Reserved for Future Issuance

Common stock reserved for future issuance consisted of the following at March 31, 2020:

Common stock options outstanding and reserved under the 2012 Plan	5,549,864
Common stock reserved under the 2012 Plan	14,158,654
Common stock reserved under the 2016 Employee Stock Purchase Plan	1,188,718
Restricted stock units outstanding under the 2012 Plan	480,256
Performance-based restricted stock units outstanding under the 2012 Plan	3,794,221
Common stock options outstanding and reserved under the Incentive    Award Agreement	2,088,212
Performance-based restricted stock units outstanding under the Incentive Award    Agreement	158,706
Total at March 31, 2020	27,418,631

Restricted stock units (RSUs) [Member]

Class Of Stock [Line Items]

Summary of Company's Restricted Stock Unit Activity and Performance Based Restricted Stock Unit Activity

The following table summarizes the Company’s restricted stock unit (not including performance-based restricted stock units) activity for the year ended March 31, 2020:

	Number of Shares			Weighted Average Price
Unvested at March 31, 2019		2,080,723		$	1.80
Granted		585,926		$	0.97
Vested		(563,271	)	$	2.29
Canceled / forfeited		(1,623,122	)	$	1.29
Unvested at March 31, 2020		480,256		$	1.95

Performance-Based Restricted Stock Units [Member]

Class Of Stock [Line Items]

Summary of Company's Restricted Stock Unit Activity and Performance Based Restricted Stock Unit Activity

The following table summarizes the Company’s performance-based restricted stock unit activity for the year ended March 31, 2020:

	Number of Shares			Weighted Average Price
Unvested at March 31, 2019		158,706		$	1.04
Granted		6,027,899		$	0.49
Vested		—		$	—
Canceled / forfeited		(2,233,678	)	$	0.49
Unvested at March 31, 2020		3,952,927		$	0.51