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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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