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INFORMATION ABOUT THE COMPANY'S OPERATIONS IN DIFFERENT INDUSTRY SEGMENTS (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jul. 31, 2017
Jan. 31, 2019
Jan. 31, 2018
Segment Reporting Information [Line Items]      
Pre Tax Gain Included Other Revenues $ 1,318 $ 0 $ 1,318