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INCOME TAXES (Details Textual) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Jan. 31, 2019
Jan. 31, 2018
Apr. 30, 2018
Oct. 31, 2018
Income Tax Disclosure [Line Items]            
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     21.00%   29.70%  
Unrecognized Tax Benefits         $ 58,000 $ 58,000
Income Tax Expense (Benefit) $ (186,000) $ 3,136,000 $ (285,000) $ 3,987,000    
Increase (Decrease) in Income Taxes   $ 3,057,000   $ 3,057,000