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SEGMENT INFORMATION (Schedule of Revenues by Geographic Area) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Oct. 31, 2018
Jul. 31, 2018
Apr. 30, 2018
Jan. 31, 2018
Oct. 31, 2017
Jul. 31, 2017
Apr. 30, 2017
Jan. 31, 2017
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues $ 83,051 $ 78,752 $ 70,424 $ 68,444 $ 75,931 $ 60,770 $ 58,222 $ 48,744 $ 300,671 $ 243,667 $ 227,289
United States of America [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 87,231 70,912 70,630
Canada [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 2,915 3,801 3,881
Central & South America [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 2,194 1,844 1,950
Total Americas [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 92,340 76,557 76,461
Germany [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 62,346 48,786 44,411
United Kingdom [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 34,216 28,019 25,313
Italy [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 16,691 13,416 12,947
France [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 15,815 13,917 13,787
Other Europe [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 32,034 27,583 27,150
Total Europe [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 161,102 131,721 123,608
China [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 27,748 22,456 16,644
Other Asia Pacific [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 17,937 10,238 8,989
Asia Pacific [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 45,685 32,694 25,633
Foreign [Member]                      
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Revenues                 $ 1,544 $ 2,695 $ 1,587