6. Net Loss per Common Share (Tables)

9 Months Ended

Jan. 31, 2020

Earnings Per Share [Abstract]

Antidilutive shares

	Three Months Ended January 31,				Nine Months Ended January 31,
	2020		2019		2020		2019
Stock options		245		117		152		161
RSUs		102		38		73		33
ESPP		–		1		7		10
Total		347		156		232		204

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 (in thousands):

	Three Months Ended January 31,				Nine Months Ended January 31,
	2020		2019		2020		2019
Stock options		2,106		2,779		2,721		2,659
RSUs		–		47		8		16
Warrants		–		–		–		17
Series E  Preferred Stock		1,979		1,979		1,979		1,979
Total		4,085		4,805		4,708		4,671