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INVESTMENT ASSETS, NET (Details) - USD ($)
$ in Thousands
Jul. 31, 2020
Apr. 30, 2020
INVESTMENT ASSETS, NET    
Land held for long-term investment $ 9,775 $ 9,751
Construction in process 2,573 2,320
Warehouse and office facilities 13,095 13,096
Less accumulated depreciation (6,645) (6,523)
Warehouse and office facilities, net 6,450 6,573
Real Estate Investment Property, Net, Total $ 18,798 $ 18,644