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v3.22.2.2

Investments - Cost, Gross Unrealized Gains and Losses, and Fair Value of Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2021
--- | --- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |  |
Gross Unrealized Gains | $ 0 | $ 0 |
Gross Unrealized Losses | (28,889) | (20,494) |
Fair Value | 676,317 |  |
Cost or Amortized Cost, money market funds | 73,674 | 112,809 |
Cost or Amortized Cost, cash equivalents and marketable securities | 709,618 | 728,556 |
Fair Value, cash equivalents and marketable securities | 680,729 | 708,062 |
Cash and Cash Equivalents |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Gross Unrealized Gains | 0 | 0 |
Gross Unrealized Losses | 0 | 0 |
Fair Value | 4,412 |  |
Cost or Amortized Cost, cash equivalents and marketable securities | 4,412 | 22,758 |
Fair Value, cash equivalents and marketable securities |  | 22,758 |
Available-for-sale Securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost or Amortized Cost | 705,206 | 705,798 |
Gross Unrealized Gains | 0 | 0 |
Gross Unrealized Losses | (28,889) | (20,494) | $ 0
Fair Value | 676,317 | 685,304 |
Commercial paper | Cash and Cash Equivalents |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost or Amortized Cost |  | 2,686 |
Gross Unrealized Gains |  | 0 |
Gross Unrealized Losses |  | 0 |
Fair Value |  | 2,686 |
Money market funds |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost or Amortized Cost, money market funds | 4,412 | 20,072 |
Fair Value, money market funds | 4,412 | 20,072 |
Asset-backed securities | Available-for-sale Securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost or Amortized Cost | 6,568 | 7,791 |
Gross Unrealized Gains | 0 | 0 |
Gross Unrealized Losses | (116) | (51) |
Fair Value | 6,452 | 7,740 |
Certificates of deposit | Available-for-sale Securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost or Amortized Cost | 15,414 |  |
Gross Unrealized Gains | 0 |  |
Gross Unrealized Losses | (77) |  |
Fair Value | 15,337 |  |
Commercial paper | Available-for-sale Securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost or Amortized Cost | 44,112 | 9,436 |
Gross Unrealized Gains | 0 | 0 |
Gross Unrealized Losses | (112) | (53) |
Fair Value | 44,000 | 9,383 |
Corporate notes and bonds | Available-for-sale Securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost or Amortized Cost | 131,504 | 129,900 |
Gross Unrealized Gains | 0 | 0 |
Gross Unrealized Losses | (2,376) | (1,796) |
Fair Value | 129,128 | 128,104 |
Sovereign bonds | Available-for-sale Securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost or Amortized Cost | 7,741 | 8,770 |
Gross Unrealized Gains | 0 | 0 |
Gross Unrealized Losses | (488) | (334) |
Fair Value | 7,253 | 8,436 |
U.S. government and agency securities | Available-for-sale Securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Cost or Amortized Cost | 499,867 | 549,901 |
Gross Unrealized Gains | 0 | 0 |
Gross Unrealized Losses | (25,720) | (18,260) |
Fair Value | $ 474,147 | $ 531,641 |

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