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ACCUMULATED OTHER COMPREHENSIVE INCOME (Notes) - USD ($)
$ in Thousands
3 Months Ended
Apr. 30, 2020
Apr. 30, 2019
Jan. 31, 2020
Jan. 31, 2019
Accumulated Other Comprehensive Income [Abstract]        
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax $ (528) $ (771)    
Accumulated Other Comprehensive Income (Loss), Net of Tax (3,748) (3,111) $ (3,220) $ (2,340)
Other Comprehensive Income (Loss), before Reclassifications, before Tax (528) (771)    
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax $ (6,459) $ (5,822) $ (5,931) $ (5,051)
Comprehensive Income (Loss) Note [Text Block] ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
        The following is a summary of the changes in accumulated other comprehensive income (loss), by component, for the periods ended April 30, 2020 and April 30, 2019:
Foreign Currency Translation AdjustmentNet Investment Hedging GainTotal Accumulated Other Comprehensive Income (Loss)
(in thousands)
Balance, January 31, 2020$(5,931) $2,711  $(3,220) 
Other comprehensive loss(528) —  (528) 
Balance, April 30, 2020$(6,459) $2,711  $(3,748) 

Foreign Currency Translation AdjustmentNet Investment Hedging GainTotal Accumulated Other Comprehensive Income (Loss)
(in thousands)
Balance, January 31, 2019$(5,051) $2,711  $(2,340) 
Other comprehensive loss(771) —  (771) 
Balance, April 30, 2019$(5,822) $2,711  $(3,111)