8. NET LOSS PER COMMON SHARE

9 Months Ended

Jan. 31, 2019

Earnings Per Share [Abstract]

NET LOSS PER COMMON SHARE

8.       NET LOSS PER COMMON SHARE

Basic net loss per common share is computed by dividing our net loss attributable to common stockholders by the weighted average number of shares of common stock outstanding during the period, excluding the dilutive effects of stock options, unvested RSUs, shares of common stock expected to be issued under our ESPP, warrants, and Series E Preferred Stock outstanding during the period. Diluted net loss per common share is computed by dividing our net loss attributable to common stockholders by the sum of the weighted average number of shares of common stock outstanding during the period plus the potential dilutive effects of stock options, unvested RSUs, shares of common stock expected to be issued under our ESPP, warrants, and Series E Preferred Stock outstanding during the period. Net loss attributable to common stockholders represents our net loss plus Series E Preferred Stock accumulated dividends. Series E Preferred Stock accumulated dividends include dividends declared for the period (regardless of whether or not the dividends have been paid) and dividends accumulated for the period (regardless of whether or not the dividends have been declared).

The potential dilutive effect of stock options, unvested RSUs, shares of common stock expected to be issued under our ESPP, and warrants outstanding during the period are calculated in accordance with the treasury stock method, but are excluded if their effect is anti-dilutive. The potential dilutive effect of our Series E Preferred Stock outstanding during the period was calculated using the if-converted method assuming the conversion of Series E Preferred Stock as of the earliest period reported or at the date of issuance, if later, but are excluded if their effect is anti-dilutive. However, because the impact of stock options, unvested RSUs, shares of common stock expected to be issued under our ESPP, warrants, and Series E Preferred Stock are anti-dilutive during periods of net loss, there was no difference between basic and diluted loss per common share amounts for the three and nine months ended January 31, 2019 and 2018.

The calculation of weighted average diluted shares outstanding for the three and nine months ended January 31, 2019 and 2018 excludes the dilutive effect of the following weighted average outstanding stock options, unvested RSUs and shares of common stock expected to be issued under our ESPP as their impact is anti-dilutive during periods of net loss:

	Three Months Ended January 31,				Nine Months Ended January 31,
	2019		2018		2019		2018
Stock Options		116,962		115,425		160,937		78,427
RSUs		38,466		–		33,606		–
ESPP		86		1,202		9,773		466
Total		155,514		116,627		204,316		78,893

The calculation of weighted average diluted shares outstanding for the three and nine months ended January 31, 2019 and 2018 also excludes the following weighted average outstanding stock options, unvested RSUs, warrants, and Series E Preferred Stock (assuming the if-converted method), as their exercise prices or conversion price were greater than the average market price of our common stock during the respective periods, resulting in an anti-dilutive effect:

	Three Months Ended January 31,				Nine Months Ended January 31,
	2019		2018		2019		2018
Stock Options		2,779,142		3,214,694		2,659,632		3,663,102
RSUs		47,482		–		15,827		–
Warrants		–		39,040		17,115		39,040
Series E Preferred Stock		1,978,783		1,978,783		1,978,783		1,978,783
Total		4,805,407		5,232,517		4,671,357		5,680,925