5. EQUITY COMPENSATION PLANS (Details - Share based compensation) - USD ($)	12 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Share based compensation	$ 1,538,000	$ 3,363,000	$ 4,898,000
Cost of contract manufacturing
Share based compensation	378,000	108,000	41,000
Selling, general and administrative
Share based compensation	820,000	1,553,000	2,599,000
Discontinued operations
Share based compensation	$ 340,000	$ 1,702,000	$ 2,258,000