6. Income Taxers (Details - Deferred income taxes) - USD ($) $ in Thousands	Apr. 30, 2019	Apr. 30, 2018
Income Tax Disclosure [Abstract]
Net operating losses	$ 113,612	$ 115,236
Share-based compensation	3,416	4,828
Deferred revenue	1,610	2,852
Deferred rent	555	568
Other	1,256	879
Total deferred tax assets	120,449	124,363
Less valuation allowance	(119,516)	(123,555)
Net deferred tax assets	933	808
Deferred tax liabilities:
Fixed assets	(933)	(808)
Total deferred tax liabilities	(933)	(808)
Net deferred tax assets	$ 0	$ 0