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CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Tables)
12 Months Ended
Mar. 31, 2019
Cash and Cash Equivalents [Abstract]  
Schedule of Cash and Cash Equivalents
The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows (in thousands):
 
March 31, 2019
 
March 31, 2018
 
March 31, 2017
 
March 31, 2016
Cash and cash equivalents
$
409,632

 
$
369,821

 
$
304,880

 
$
210,711

Restricted cash
188

 
910

 
846

 
186

     Total cash, cash equivalents and restricted cash
$
409,820

 
$
370,731

 
$
305,726

 
$
210,897

Schedule of Restricted Cash
The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the consolidated statements of cash flows (in thousands):
 
March 31, 2019
 
March 31, 2018
 
March 31, 2017
 
March 31, 2016
Cash and cash equivalents
$
409,632

 
$
369,821

 
$
304,880

 
$
210,711

Restricted cash
188

 
910

 
846

 
186

     Total cash, cash equivalents and restricted cash
$
409,820

 
$
370,731

 
$
305,726

 
$
210,897

Summary of Marketable Securities Classified as Short-term and Long-term
The following is a summary of marketable securities held by NetScout at March 31, 2019 classified as short-term and long-term (in thousands):
 
Amortized
Cost
 
Unrealized
Gains
 
Fair
Value
Type of security:
 
 
 
 
 
U.S. government and municipal obligations
$
27,610

 
$
12

 
$
27,622

Commercial paper
48,722

 

 
48,722

Total short-term marketable securities
76,332

 
12

 
76,344

Corporate bonds
1,007

 
5

 
1,012

Total long-term marketable securities
1,007

 
5

 
1,012

Total marketable securities
$
77,339

 
$
17

 
$
77,356

 
The following is a summary of marketable securities held by NetScout at March 31, 2018, classified as short-term and long-term (in thousands):
 
Amortized
Cost
 
Unrealized
Losses
 
Fair
Value
Type of security:
 
 
 
 
 
U.S. government and municipal obligations
$
42,246

 
$
(60
)
 
$
42,186

Commercial paper
33,003

 

 
33,003

Corporate bonds
2,754

 
(2
)
 
2,752

Total short-term marketable securities
78,003

 
(62
)
 
77,941

Total long-term marketable securities

 

 

Total marketable securities
$
78,003

 
$
(62
)
 
$
77,941

Summary of Contractual Maturities of Marketable Securities
Contractual maturities of the Company’s marketable securities held at March 31, 2019 and March 31, 2018 were as follows (in thousands):
 
March 31,
2019
 
March 31,
2018
Available-for-sale securities:
 
 
 
Due in 1 year or less
$
76,344

 
$
77,941

Due after 1 year through 5 years
1,012

 

 
$
77,356

 
$
77,941