v3.20.1
Marketable Securities (Tables)
 12 Months Ended
Jan. 31, 2020
Investments, Debt and Equity Securities [Abstract]  
Summary of Marketable Securities
As of January 31, 2020 and 2019, our marketable securities consisted of the following: 
As of January 31, 2020
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair
Value
(in thousands)
Commercial paper$37,894  $—  $—  $37,894  
Agency bonds141,157  49  (43) 141,163  
Corporate and other debt securities320,407  775  (16) 321,166  
U.S. government agency securities71,794  45  (2) 71,837  
Marketable securities$571,252  $869  $(61) $572,060  

As of January 31, 2019
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair
Value
(in thousands)
Commercial paper$1,243  $—  $—  $1,243  
Corporate bonds53,267  —  (53) 53,214  
Agency bonds32,675  —  (71) 32,604  
U.S. government agency securities24,028  —  (11) 24,017  
Treasury bills1,699  —  —  1,699  
Marketable securities$112,912  $—  $(135) $112,777  
Summary of Contractual Maturities of Marketable Securities
The following table presents the contractual maturities of our marketable securities as of January 31, 2020 and 2019:
As of January 31,
20202019
(in thousands)
Less than one year$315,900  $85,077  
Due in one to five years256,160  27,700  
Total$572,060  $112,777