11. SALE OF RESEARCH AND DEVELOPMENT ASSETS (Details - Balance Sheet) - USD ($) $ in Thousands	Jul. 31, 2018	Apr. 30, 2018
Liabilities:
Accrued payroll and related costs	$ 2,030	$ 2,564
Discontinued Operations [Member]
Assets:
Other receivables	2,014	5,000
Total assets of discontinued operations	2,014	5,000
Liabilities:
Accounts payable	8	32
Accrued clinical trial and related fees	1,334	3,613
Accrued payroll and related costs	326	614
Other liabilities	301	291
Total liabilities of discontinued operations	$ 1,969	$ 4,550