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Other Income, Net (Tables)
 12 Months Ended
Jan. 31, 2020
Other Income and Expenses [Abstract]  
Schedule of Other Income
Other income, net consisted of the following (in thousands):
 
Fiscal Year Ended January 31,
2020
 
2019
 
2018
Foreign currency gain (loss)
$
(708
)
 
$
(2,103
)
 
$
1,177

Accretion (amortization) on investments
3,001

 
2,492

 
(1,718
)
Interest income
25,185

 
15,388

 
8,383

Other income, net
$
27,478

 
$
15,777

 
$
7,842