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CASH, CASH EQUIVALENTS, MARKETABLE SECURITIES AND INVESTMENTS
 9 Months Ended
Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
CASH, CASH EQUIVALENTS, MARKETABLE SECURITIES AND INVESTMENTS CASH, CASH EQUIVALENTS, MARKETABLE SECURITIES AND INVESTMENTS
The Company considers all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents and those investments with original maturities greater than three months to be marketable securities. Cash and cash equivalents mainly consisted of U.S. government and municipal obligations, commercial paper, money market instruments and cash maintained with various financial institutions at December 31, 2024 and March 31, 2024.
Marketable Securities
The following is a summary of marketable securities held by NetScout at December 31, 2024, classified as short-term and long-term (in thousands):
Amortized
Cost		Unrealized
Losses		Fair
Value
Type of security:
U.S. government and municipal obligations$987 $— $987 
Commercial paper13,130 — 13,130 
Certificates of deposit510 — 510 
Total short-term marketable securities14,627 — 14,627 
U.S. government and municipal obligations1,016 (1)1,015 
Total long-term marketable securities1,016 (1)1,015 
Total marketable securities$15,643 $(1)$15,642 
The following is a summary of marketable securities held by NetScout at March 31, 2024, classified as short-term and long-term (in thousands):
Amortized
Cost		Unrealized
Losses		Fair
Value
Type of security:
U.S. government and municipal obligations$10,523 $(26)$10,497 
Commercial paper8,648 — 8,648 
Certificates of deposit2,807 — 2,807 
Total short-term marketable securities21,978 (26)21,952 
U.S. government and municipal obligations1,004 (10)994 
Total long-term marketable securities1,004 (10)994 
Total marketable securities$22,982 $(36)$22,946 
Contractual maturities of the Company's marketable securities held at December 31, 2024 and March 31, 2024 were as follows (in thousands):
December 31,
2024		March 31,
2024
Available-for-sale securities:
Due in 1 year or less$14,627 $21,952 
Due after 1 year through 5 years1,015 994 
$15,642 $22,946 
Investments
In February 2023, the Company entered into a forward share purchase agreement with Napatech A/S (Napatech), a publicly traded Danish company registered on the Oslo stock exchange, to purchase approximately 6.2 million shares of Napatech's common stock for $7.5 million. In April 2023, the Company settled the forward share purchase contract with Napatech in exchange for approximately 6.2 million shares of Napatech's common stock and recorded a $0.2 million change in the fair value of the derivative instrument in other income (expense), net within the Company's consolidated statement of operations during the nine months ended December 31, 2023. As part of the agreement, the Company received the right to designate a representative to be nominated for election to the Napatech Board of Directors, which was approved by Napatech's Nomination Committee in April 2023. The Company accounts for this investment under the equity method and has elected to apply the fair value option to the investment. The Company records the investment at fair value at the end of each period based on the closing price of Napatech's stock and any change in fair value during the period is recorded in other income (expense), net within the Company's consolidated statement of operations. At December 31, 2024 and March 31, 2024, the fair value of the investment in Napatech was $13.9 million and $11.5 million, respectively, and was included in marketable securities and investments in the Company's consolidated balance sheet. During the nine months ended December 31, 2024 and 2023, the Company recognized a $2.9 million gain and a $1.8 million gain, respectively, in the fair value of the equity investment in
Napatech in other income (expense), net within the Company's consolidated statement of operations. For the nine months ended December 31, 2024, the unrealized loss related to foreign currency translation on the equity investment in Napatech was $0.5 million. For the nine months ended December 31, 2023, the unrealized gain related to foreign currency translation on the equity investment in Napatech was immaterial.