Cash, Cash Equivalents, and Marketable Securities (Tables)
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12 Months Ended |
Mar. 31, 2026 |
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| Cash, Cash Equivalents, and Short-Term Investments [Abstract] |
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| Schedule of Cash, Cash Equivalents, and Marketable Securities |
Cash, cash equivalents and marketable securities consisted of the following (in thousands): | | | | | | | | | | | | | March 31, 2026 | | March 31, 2025 | | Cash and cash equivalents | | | | | Cash | $ | 44,526 | | | $ | 93,954 | | | Money market funds | 1,374,706 | | | 2,621,457 | | | Total cash and cash equivalents | $ | 1,419,232 | | | $ | 2,715,411 | | | Marketable securities | | | | | Corporate bonds | $ | 748,422 | | | $ | — | | | U.S. Treasury securities, available-for-sale | 2,124,179 | | | — | | | U.S. Treasury securities, held-to-maturity | — | | | 2,171,480 | | | Total marketable securities | $ | 2,872,601 | | | $ | 2,171,480 | | | | | | | Total cash, cash equivalents, and marketable securities | $ | 4,291,833 | | | $ | 4,886,891 | |
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| Schedule of Unrealized Positions for Marketable Securities |
The following table summarizes the unrealized positions for the Company’s marketable securities (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | As of March 31, 2026 | | Amortized Cost(1) | | Gross Unrealized
Gains | | Gross Unrealized
Losses | | Fair Value | | Corporate bonds | $ | 751,103 | | | $ | — | | | $ | (2,681) | | | $ | 748,422 | | | U.S. Treasury securities | 2,125,053 | | | 538 | | | (1,412) | | | 2,124,179 | | | Total marketable securities, available-for-sale | $ | 2,876,156 | | | $ | 538 | | | $ | (4,093) | | | $ | 2,872,601 | | | | | | | | | | | As of March 31, 2025 | | Amortized Cost(1) | | Gross Unrealized
Gains | | Gross Unrealized
Losses | | Fair Value | | U.S. Treasury securities, held-to-maturity | $ | 2,171,480 | | | $ | 1,267 | | | $ | (463) | | | $ | 2,172,284 | |
(1)Excludes $19.6 million and $12.1 million of accrued interest receivable as of March 31, 2026 and 2025, respectively, which is included in “Other current assets” on the consolidated balance sheets.
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| Schedule of Marketable Securities as Level 2 Measurements Within the Fair Value Hierarchy |
The estimated fair value of available-for-sale marketable securities by contractual maturity were as follows (in thousands): | | | | | | | March 31, 2026 | | Due within one year | $ | 2,145,345 | | | Due after one year but within five years | 727,256 | | | Total estimated fair value of available-for-sale securities | $ | 2,872,601 | |
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