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Fair Value Measurements (Tables)
9 Months Ended
Oct. 31, 2018
Fair Value Disclosures [Abstract]  
Schedule of financial assets and liabilities measured at fair value on a recurring basis
The following tables present information about the Company’s financial assets and liabilities that have been measured at fair value on a recurring basis as of October 31, 2018 and January 31, 2018, and indicate the fair value hierarchy of the valuation inputs utilized to determine such fair value (in thousands):
 
Fair Value Measurement at October 31, 2018
 
Level 1
 
Level 2
 
Level 3
 
Total
Financial Assets:
 
 
 
 
 
 
 
Cash and cash equivalents:
 
 
 
 
 
 
 
Money market funds
$
893

 
$

 
$

 
$
893

Short-term investments:
 
 
 
 
 
 
 
U.S. government treasury securities
382,681

 

 

 
382,681

Total financial assets
$
383,574

 
$

 
$

 
$
383,574

 
Fair Value Measurement at January 31, 2018
 
Level 1
 
Level 2
 
Level 3
 
Total
Financial Assets:
 
 
 
 
 
 
 
Cash and cash equivalents:
 
 
 
 
 
 
 
Money market funds
$
45,918

 
$

 
$

 
$
45,918

Short-term investments:
 
 
 
 
 
 
 
U.S. government treasury securities
217,072

 

 

 
217,072

Total financial assets
$
262,990

 
$

 
$

 
$
262,990