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FAIR VALUE MEASUREMENTS (Tables) | 6 Months Ended
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Sep. 30, 2025
Fair Value Disclosures [Abstract] |
Schedule of Financial Assets and Liabilities | The following tables present the Company's financial assets and liabilities measured on a recurring basis using the fair value hierarchy at September 30, 2025 and March 31, 2025 (in thousands):
| Fair Value Measurements at
| September 30, 2025
| Level 1 |  | Level 2 |  | Level 3 |  | Total
ASSETS: |  |  |  |  |  |  |
Cash and cash equivalents | $ | 444,681 |  |  | $ | 38,699 |  |  | $ | — |  |  | $ | 483,380 |
U.S. government and municipal obligations | 9,996 |  |  | — |  |  | — |  |  | 9,996 |
Commercial paper | — |  |  | 18,991 |  |  | — |  |  | 18,991 |
Corporate bonds |  |  | 996 |  |  | — |  |  | 996 |
Certificates of deposit | — |  |  | 3,543 |  |  | — |  |  | 3,543 |
Derivative financial instruments |  |  | 91 |  |  | — |  |  | 91 |
Agency bonds |  |  | 9,999 |  |  | — |  |  | 9,999 |
| $ | 454,677 |  |  | $ | 72,319 |  |  | $ | — |  |  | $ | 526,996 |
LIABILITIES: |  |  |  |  |  |  |
Derivative financial instruments | $ | — |  |  | $ | (137) |  |  | $ | — |  |  | $ | (137) |
| $ | — |  |  | $ | (137) |  |  | $ | — |  |  | $ | (137) |
| Fair Value Measurements at
| March 31, 2025
| Level 1 |  | Level 2 |  | Level 3 |  | Total
ASSETS: |  |  |  |  |  |  |
Cash and cash equivalents | $ | 434,121 |  |  | $ | 23,294 |  |  | $ | — |  |  | $ | 457,415 |
U.S. government and municipal obligations | 3,008 |  |  | 2,410 |  |  | — |  |  | 5,418 |
Commercial paper | — |  |  | 17,358 |  |  | — |  |  | 17,358 |
Certificates of deposit | — |  |  | 505 |  |  | — |  |  | 505 |
Equity investment in Napatech | 11,781 |  |  | — |  |  | — |  |  | 11,781 |
Derivative financial instruments | — |  |  | 197 |  |  | — |  |  | 197 |
| $ | 448,910 |  |  | $ | 43,764 |  |  | $ | — |  |  | $ | 492,674 |
LIABILITIES: |  |  |  |  |  |  |
Derivative financial instruments | $ | — |  |  | $ | (55) |  |  | $ | — |  |  | $ | (55) |
| $ | — |  |  | $ | (55) |  |  | $ | — |  |  | $ | (55) |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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