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Other Assets
 6 Months Ended
Jul. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Assets Other Assets
Other assets consisted of the following (in thousands):
 
July 31, 2019
 
January 31, 2019
Non-marketable equity and other investments
$
61,258

 
$
50,546

Prepayments for computing infrastructure platforms
11,612

 
16,976

Technology patents and other intangible assets, net
18,702

 
20,335

Deposits
4,010

 
4,383

Net deferred tax assets
4,495

 
4,544

Other
38,818

 
50,576

Total
$
138,895

 
$
147,360


Technology patents and other intangible assets with estimable useful lives are amortized on a straight-line basis. As of July 31, 2019, the future estimated amortization expense is as follows (in thousands):
Fiscal period:
 
Remainder of 2020
$
1,621

2021
2,926

2022
2,512

2023
2,246

2024
1,943

Thereafter
7,454

Total
$
18,702