XML 78 R9.htm IDEA: XBRL DOCUMENT v3.19.2
Cash Equivalents and Marketable Securities
 6 Months Ended
Jul. 31, 2019
Cash Equivalents And Marketable Securities [Abstract]  
Cash Equivalents and Marketable Securities Cash Equivalents and Marketable Securities
As of July 31, 2019 and January 31, 2019, our cash equivalents and marketable securities consisted of the following: 
July 31, 2019
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair
Value
(in thousands)
Money market funds$95,577  $—  $—  $95,577  
Commercial paper14,239  —  —  14,239  
Corporate debt securities4,900  —  —  4,900  
Treasury bills19,485  2  —  19,487  
Cash equivalents134,201  2  —  134,203  
Commercial paper54,007  —  —  54,007  
Agency bonds18,399  9  (9) 18,399  
Corporate and other debt securities269,376  125  (292) 269,209  
U.S. government agency securities97,709  68  (15) 97,762  
Treasury bills101,959  44  —  102,003  
Marketable securities$541,450  $246  $(316) $541,380  

January 31, 2019
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Estimated
Fair
Value
(in thousands)
Money market funds$78  $—  $—  $78  
Cash equivalents78  —  —  78  
Commercial paper1,243  —  —  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  
We review the individual securities that have unrealized losses on a regular basis to evaluate whether or not any security has experienced an other-than-temporary decline in fair value. We evaluate, among other factors, whether we have the intention to sell any of these marketable securities and whether it is more likely than not that we will be required to sell any of them before recovery of the amortized cost basis. Based on the available evidence, we concluded that the gross unrealized losses on the marketable securities as of July 31, 2019 and January 31, 2019, are temporary in nature. There were no material realized gains or losses from available-for-sale securities that were reclassified out of accumulated other comprehensive loss for the three and six months ended July 31, 2019 and 2018.
The following table presents the contractual maturities of our marketable securities as of July 31, 2019 and January 31, 2019:
As of
July 31,
2019		January 31,
2019
(in thousands)
Less than one year$421,166  $85,077  
Due in one to five years120,214  27,700  
Total$541,380  $112,777