8. INCOME TAXES (Details - Deferred income taxes) - USD ($)	Apr. 30, 2016	Apr. 30, 2015
Income Tax Disclosure [Abstract]
Share-based compensation	$ 8,806,000	$ 7,119,000
Deferred revenue	4,296,000	2,840,000
Other	2,547,000	2,765,000
Net operating losses	152,746,000	133,800,000
Total deferred tax assets	168,395,000	146,524,000
Less valuation allowance	(168,395,000)	(146,524,000)
Net deferred tax assets	$ 0	$ 0