CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS
3 Months Ended
Apr. 30, 2018
Cash, Cash Equivalents, and Short-term Investments [Abstract]  
Cash, Cash Equivalents and Short-term Investments
CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS

The following tables summarize our cash, cash equivalents, and short-term investments as of April 30, 2018 and January 31, 2018:
 
 
April 30, 2018
(in thousands) 
 
Cost Basis
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Estimated Fair Value
Cash and cash equivalents:
 
 
 
 
 
 
 
 
Cash and bank time deposits
 
$
341,974

 
$

 
$

 
$
341,974

Money market funds
 
40,263

 

 

 
40,263

Total cash and cash equivalents
 
$
382,237

 
$

 
$

 
$
382,237

 
 
 
 
 
 
 
 
 
Short-term investments:
 
 
 
 
 
 
 
 
Corporate debt securities
 
$
2,010

 
$

 
$

 
$
2,010

Bank time deposits
 
7,210

 

 

 
7,210

Total short-term investments
 
$
9,220

 
$

 
$

 
$
9,220

 
 
January 31, 2018
(in thousands)
 
Cost Basis
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Estimated Fair Value
Cash and cash equivalents:
 
 
 
 
 
 
 
 
Cash and bank time deposits
 
$
337,756

 
$

 
$

 
$
337,756

Money market funds
 
186

 

 

 
186

Total cash and cash equivalents
 
$
337,942

 
$

 
$

 
$
337,942

 
 
 
 
 
 
 
 
 
Short-term investments:
 
 
 
 
 
 
 
 
Corporate debt securities (available-for-sale)
 
$
2,002

 
$

 
$

 
$
2,002

Bank time deposits
 
4,564

 

 

 
4,564

Total short-term investments
 
$
6,566

 
$

 
$

 
$
6,566



Bank time deposits which are reported within short-term investments consist of deposits held outside of the U.S. with maturities of greater than 90 days, or without specified maturity dates which we intend to hold for periods in excess of 90 days. All other bank deposits are included within cash and cash equivalents.

There were no proceeds from maturities and sales of short-term investments during the three months ended April 30, 2018. During the three months ended April 30, 2017, proceeds from maturities and sales of short-term investments were $0.3 million.