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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
[2]
Oct. 31, 2019
Oct. 31, 2018
[2]
Statement Of Income And Comprehensive Income [Abstract]        
Net loss $ (40,896) [1] $ (40,196) $ (113,958) [1] $ (114,918)
Other comprehensive loss        
Changes in foreign currency translation adjustment [3] (7) [1] (89) (83) [1] (375)
Net unrealized loss on cash flow hedge [1],[3] (51)   (51)  
Other comprehensive loss [3] (58) [1] (89) (134) [1] (375)
Comprehensive loss $ (40,954) [1] $ (40,285) $ (114,092) [1] $ (115,293)
[1] As reported and disclosed under ASC Topic 842
[2] As reported and disclosed under ASC Topic 840
[3] Tax effect was not material