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INCOME TAXES (Narrative) (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Apr. 30, 2018
Jan. 31, 2018
Apr. 30, 2017
Apr. 30, 2018
Apr. 30, 2017
Dec. 31, 2018
Dec. 31, 2017
Oct. 31, 2017
Income Tax Contingency [Line Items]                
Unrecognized tax benefits, interest accrued $ 75,000     $ 75,000        
Effective Income Tax Rate Reconciliation, Percent, Total       48.00% 31.00%      
Income Tax Expense (Benefit) 1,656,000   $ 1,467,000 $ 6,156,000 $ 2,010,000      
Unrecognized Tax Benefits, Ending Balance $ 1,200,000     1,200,000       $ 1,100,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent             35.00%  
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount       2,500,000     $ 2,500,000  
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount       $ 400,000        
Increase (Decrease) in Income Taxes   $ 400,000            
Increase Decrease In Net Deferred Tax Assets   $ 400,000            
Scenario, Plan [Member]                
Income Tax Contingency [Line Items]                
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent           21.00%