Fair Value Measurements
 3 Months Ended
Apr. 30, 2018
Fair Value Disclosures [Abstract]  
Fair Value Measurements
Fair Value Measurements
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 April 30, 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 April 30, 2018
 
Level 1
 
Level 2
 
Level 3
 
Total
Financial Assets:
 
 
 
 
 
 
 
Cash and cash equivalents:
 
 
 
 
 
 
 
Money market funds
$
94,300

 
$
—

 
$
—

 
$
94,300

Short-term investments:
 
 
 
 
 
 
 
U.S. government treasury securities
159,371

 
—

 
—

 
159,371

Total financial assets
$
253,671

 
$
—

 
$
—

 
$
253,671

 
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


The Company utilized the market approach and Level 1 valuation inputs to value its money market mutual funds and U.S. government treasury securities because published net asset values were readily available. As of April 30, 2018 and January 31, 2018, gross unrealized gains and unrealized losses for cash equivalents and short-term investments were not material, and the contractual maturity of all marketable securities was less than one year.