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Fair Value Measurements - Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Mar. 31, 2022
--- | --- | ---
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | $ 666,162 |
Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 98,332 |
Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 666,162 | $ 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 | 5,836 | 7,740
Commercial paper | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 5,040 | 9,383
Corporate notes and bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 120,313 | 128,104
Sovereign bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 7,351 | 8,436
U.S. government and agency securities | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 527,622 | 531,641
Fair Value, Recurring |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 764,494 | 708,062
Liabilities: |  |
Contingent earn-out consideration liability | 21,080 |
Total contingent earn-out consideration liability | 21,080 |
Fair Value, Recurring | Cash and Cash Equivalents |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 98,332 | 22,758
Fair Value, Recurring | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 666,162 | 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 | 98,332 | 20,072
Fair Value, Recurring | Asset-backed securities | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 5,836 | 7,740
Fair Value, Recurring | Commercial paper | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 5,040 | 9,383
Fair Value, Recurring | Corporate notes and bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 120,313 | 128,104
Fair Value, Recurring | Sovereign bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 7,351 | 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 | 527,622 | 531,641
Level 1 | Fair Value, Recurring |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 624,492 | 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 | 98,332 | 20,072
Level 1 | Fair Value, Recurring | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 526,160 | 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 | 98,332 | 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 | 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 | 526,160 | 530,174
Level 2 | Fair Value, Recurring |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 140,002 | 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 | 140,002 | 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 | 5,836 | 7,740
Level 2 | Fair Value, Recurring | Commercial paper | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 5,040 | 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 | 120,313 | 128,104
Level 2 | Fair Value, Recurring | Sovereign bonds | Available-for-sale Securities |  |
Assets, Fair Value Disclosure [Abstract] |  |
Cash equivalents and marketable securities | 7,351 | 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 | 1,462 | 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 | 21,080 |
Total contingent earn-out consideration liability | 21,080 |
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 | 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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