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CASH, CASH EQUIVALENTS, MARKETABLE SECURITIES AND INVESTMENTS
 12 Months Ended
Mar. 31, 2025
Cash and Cash Equivalents [Abstract]  
CASH, CASH EQUIVALENTS, MARKETABLE SECURITIES AND INVESTMENTS CASH, CASH EQUIVALENTS, MARKETABLE SECURITIES AND INVESTMENTS
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 March 31, 2025 and 2024.
Marketable Securities
The following is a summary of marketable securities held by the Company at March 31, 2025 classified as short-term and long-term (in thousands):
Amortized
Cost		Unrealized
Gains (Losses)		Fair
Value
Type of security:
U.S. government and municipal obligations$4,413 $1 $4,414 
Commercial paper17,358 — 17,358 
Certificates of deposit505 — 505 
Total short-term marketable securities22,276 1 22,277 
U.S. government and municipal obligations1,005 (1)1,004 
Total long-term marketable securities1,005 (1)1,004 
Total marketable securities$23,281 $— $23,281 
 
The following is a summary of marketable securities held by the Company 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 March 31, 2025 and 2024 (in thousands) were as follows:
March 31,
2025		March 31,
2024
Available-for-sale securities:
Due in 1 year or less$22,277 $21,952 
Due after 1 year through 5 years1,004 994 
$23,281 $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 fiscal year ended March 31, 2024. 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 March 31, 2025 and 2024, the fair value of the investment in Napatech was $11.8 million and $11.5 million, respectively, and was included in marketable securities and investments in the Company's consolidated balance sheet. During the fiscal years ended March 31, 2025 and 2024, the Company recognized gains of $0.4 million and $5.5 million, 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 fiscal years ended March 31, 2025 and 2024, the unrealized losses related to foreign currency translation on the equity investment in Napatech were immaterial.