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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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