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Fair Value Measurements - Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Mar. 31, 2022
--- | --- | ---
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | $ 676,317 |
Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 4,412 |
Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 676,317 | $ 685,304
Commercial paper | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities |  | 2,686
Asset-backed securities | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 6,452 | 7,740
Certificates of deposit | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 15,337 |
Commercial paper | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 44,000 | 9,383
Corporate notes and bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 129,128 | 128,104
Sovereign bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 7,253 | 8,436
U.S. government and agency securities | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 474,147 | 531,641
Fair Value, Recurring |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 680,729 | 708,062
Liabilities: |  |
Contingent earn-out consideration liability | 21,040 |
Total contingent earn-out consideration liability | 21,040 |
Fair Value, Recurring | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 4,412 | 22,758
Fair Value, Recurring | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 676,317 | 685,304
Fair Value, Recurring | Commercial paper | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities |  | 2,686
Fair Value, Recurring | Money market funds | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 4,412 | 20,072
Fair Value, Recurring | Asset-backed securities | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 6,452 | 7,740
Fair Value, Recurring | Certificates of deposit | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 15,337 |
Fair Value, Recurring | Commercial paper | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 44,000 | 9,383
Fair Value, Recurring | Corporate notes and bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 129,128 | 128,104
Fair Value, Recurring | Sovereign bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 7,253 | 8,436
Fair Value, Recurring | U.S. government and agency securities | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 474,147 | 531,641
Level 1 | Fair Value, Recurring |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 478,559 | 550,246
Liabilities: |  |
Contingent earn-out consideration liability | 0 |
Total contingent earn-out consideration liability | 0 |
Level 1 | Fair Value, Recurring | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 4,412 | 20,072
Level 1 | Fair Value, Recurring | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 474,147 | 530,174
Level 1 | Fair Value, Recurring | Commercial paper | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities |  | 0
Level 1 | Fair Value, Recurring | Money market funds | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 4,412 | 20,072
Level 1 | Fair Value, Recurring | Asset-backed securities | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 0
Level 1 | Fair Value, Recurring | Certificates of deposit | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 |
Level 1 | Fair Value, Recurring | Commercial paper | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 0
Level 1 | Fair Value, Recurring | Corporate notes and bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 0
Level 1 | Fair Value, Recurring | Sovereign bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 0
Level 1 | Fair Value, Recurring | U.S. government and agency securities | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 474,147 | 530,174
Level 2 | Fair Value, Recurring |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 202,170 | 157,816
Liabilities: |  |
Contingent earn-out consideration liability | 0 |
Total contingent earn-out consideration liability | 0 |
Level 2 | Fair Value, Recurring | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 2,686
Level 2 | Fair Value, Recurring | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 202,170 | 155,130
Level 2 | Fair Value, Recurring | Commercial paper | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities |  | 2,686
Level 2 | Fair Value, Recurring | Money market funds | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 0
Level 2 | Fair Value, Recurring | Asset-backed securities | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 6,452 | 7,740
Level 2 | Fair Value, Recurring | Certificates of deposit | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 15,337 |
Level 2 | Fair Value, Recurring | Commercial paper | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 44,000 | 9,383
Level 2 | Fair Value, Recurring | Corporate notes and bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 129,128 | 128,104
Level 2 | Fair Value, Recurring | Sovereign bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 7,253 | 8,436
Level 2 | Fair Value, Recurring | U.S. government and agency securities | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 1,467
Level 3 | Fair Value, Recurring |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 0
Liabilities: |  |
Contingent earn-out consideration liability | 21,040 |
Total contingent earn-out consideration liability | 21,040 |
Level 3 | Fair Value, Recurring | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 0
Level 3 | Fair Value, Recurring | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 0
Level 3 | Fair Value, Recurring | Commercial paper | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities |  | 0
Level 3 | Fair Value, Recurring | Money market funds | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 0
Level 3 | Fair Value, Recurring | Asset-backed securities | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 0
Level 3 | Fair Value, Recurring | Certificates of deposit | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 |
Level 3 | Fair Value, Recurring | Commercial paper | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 0
Level 3 | Fair Value, Recurring | Corporate notes and bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 0
Level 3 | Fair Value, Recurring | Sovereign bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 0 | 0
Level 3 | Fair Value, Recurring | U.S. government and agency securities | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | $ 0 | $ 0

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