OTHER ASSETS (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Apr. 30, 2020
OTHER ASSETS
Prepaid expenses	$ 931	$ 464
Receivables	281	156
Right-of-use assets associated with leases of office facilities	133	109
Other assets	170	170
Property and equipment	219	217
Less accumulated depreciation	190	182
Property and equipment, net	29	35
Other Assets	$ 1,544	$ 934