10. SALE OF RESEARCH AND DEVELOPMENT ASSETS (Details - Balance Sheet) - USD ($) $ in Thousands	Jan. 31, 2019	Apr. 30, 2018
Liabilities:
Accrued payroll and related costs	$ 2,549	$ 2,564
Discontinued Operations [Member]
Assets:
Other receivables	0	5,000
Total assets of discontinued operations	0	5,000
Liabilities:
Accounts payable	0	32
Accrued clinical trial and related fees	0	3,613
Accrued payroll and related costs	0	614
Other liabilities	125	291
Total liabilities of discontinued operations	$ 125	$ 4,550