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DERIVATIVE INSTRUMENTS DERIVATE INSTRUMENTS (Details 3) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
Foreign currency contracts | Not designated as hedging instruments        
Derivative Instruments, Gain (Loss)        
Foreign currency contract gain $ 202 $ 166 $ 189 $ 368