7. Net Loss per Common Share (Details - Antidilutive shares) - shares	12 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2017
Stock Options
Dilutive effect of shares on diluted shares outstanding	138,822	53,978	0
RSUs [Member]
Dilutive effect of shares on diluted shares outstanding	34,122	0	0
Employee Stock Purchase Plan [Member]
Dilutive effect of shares on diluted shares outstanding	10,589	1,972	45,767
Options, RSUs and ESPP [Member]
Dilutive effect of shares on diluted shares outstanding	183,533	55,950	45,767