7. Net Loss per Common Share (Tables)

12 Months Ended

Apr. 30, 2019

Earnings Per Share [Abstract]

Antidilutive shares

	2019		2018		2017
Stock options		138,822		53,978		–
RSUs		34,122		–		–
ESPP		10,589		1,972		45,767
Total		183,533		55,950		45,767

The calculation of weighted average diluted shares outstanding 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:

	2019		2018		2017
Stock options		2,712,454		3,636,699		4,156,421
RSUs		33,532		–		–
Warrants		12,942		39,040		39,040
Series E Preferred Stock		1,978,783		1,978,783		1,955,588
Total		4,737,711		5,654,522		6,151,049