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Fair Value Measurements (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Mar. 31, 2021
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | $ 687,990 | $ 93,086
Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 16,945
Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 685,304 | 76,141
Money market funds | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 9,838
Asset-backed securities | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 7,740 | 3,263
Certificates of deposit | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 1,301
Certificates of deposit | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 4,868
Commercial paper | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 2,686 | 2,290
Corporate notes and bonds | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 3,516
Corporate notes and bonds | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 128,104 | 46,641
Sovereign bonds | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 8,436 | 1,099
U.S. government and agency securities | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 531,641 | 3,858
Fair Value, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 708,062 | 93,086
Fair Value, Recurring | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 22,758 | 16,945
Fair Value, Recurring | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 685,304 | 76,141
Fair Value, Recurring | Money market funds | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 20,072 | 9,838
Fair Value, Recurring | Asset-backed securities | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 7,740 | 3,263
Fair Value, Recurring | Certificates of deposit | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 1,301
Fair Value, Recurring | Certificates of deposit | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 4,868
Fair Value, Recurring | Commercial paper | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 2,686 | 2,290
Fair Value, Recurring | Commercial paper | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 9,383 | 16,412
Fair Value, Recurring | Corporate notes and bonds | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 3,516
Fair Value, Recurring | Corporate notes and bonds | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 128,104 | 46,641
Fair Value, Recurring | Sovereign bonds | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 8,436 | 1,099
Fair Value, Recurring | U.S. government and agency securities | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 531,641 | 3,858
Level 1 | Fair Value, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 550,246 | 13,696
Level 1 | Fair Value, Recurring | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 20,072 | 9,838
Level 1 | Fair Value, Recurring | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 530,174 | 3,858
Level 1 | Fair Value, Recurring | Money market funds | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 20,072 | 9,838
Level 1 | Fair Value, Recurring | Asset-backed securities | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 1 | Fair Value, Recurring | Certificates of deposit | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 0
Level 1 | Fair Value, Recurring | Certificates of deposit | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 0
Level 1 | Fair Value, Recurring | Commercial paper | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 1 | Fair Value, Recurring | Commercial paper | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 1 | Fair Value, Recurring | Corporate notes and bonds | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 0
Level 1 | Fair Value, Recurring | Corporate notes and bonds | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 1 | Fair Value, Recurring | Sovereign bonds | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 1 | Fair Value, Recurring | U.S. government and agency securities | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 530,174 | 3,858
Level 2 | Fair Value, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 157,816 | 79,390
Level 2 | Fair Value, Recurring | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 2,686 | 7,107
Level 2 | Fair Value, Recurring | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 155,130 | 72,283
Level 2 | Fair Value, Recurring | Money market funds | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 2 | Fair Value, Recurring | Asset-backed securities | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 7,740 | 3,263
Level 2 | Fair Value, Recurring | Certificates of deposit | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 1,301
Level 2 | Fair Value, Recurring | Certificates of deposit | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 4,868
Level 2 | Fair Value, Recurring | Commercial paper | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 2,686 | 2,290
Level 2 | Fair Value, Recurring | Commercial paper | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 9,383 | 16,412
Level 2 | Fair Value, Recurring | Corporate notes and bonds | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 3,516
Level 2 | Fair Value, Recurring | Corporate notes and bonds | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 128,104 | 46,641
Level 2 | Fair Value, Recurring | Sovereign bonds | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 8,436 | 1,099
Level 2 | Fair Value, Recurring | U.S. government and agency securities | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 1,467 | 0
Level 3 | Fair Value, Recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 3 | Fair Value, Recurring | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 3 | Fair Value, Recurring | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 3 | Fair Value, Recurring | Money market funds | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 3 | Fair Value, Recurring | Asset-backed securities | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 3 | Fair Value, Recurring | Certificates of deposit | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 0
Level 3 | Fair Value, Recurring | Certificates of deposit | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 0
Level 3 | Fair Value, Recurring | Commercial paper | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 3 | Fair Value, Recurring | Commercial paper | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 3 | Fair Value, Recurring | Corporate notes and bonds | Cash and cash equivalents |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value |  | 0
Level 3 | Fair Value, Recurring | Corporate notes and bonds | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 3 | Fair Value, Recurring | Sovereign bonds | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | 0 | 0
Level 3 | Fair Value, Recurring | U.S. government and agency securities | Available-for-sale securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair Value | $ 0 | $ 0

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