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Credit Losses - Schedule of Fair Value and Unrealized Losses on Available for Sale Debt Securities (Detail) - USD ($) $ in Thousands | Oct. 31, 2023 | Apr. 30, 2023
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Commercial paper |  |
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] |  |
Less than 12 months, fair value | $ 8,259 | $ 8,229
Less than 12 months, unrealized losses | 5 | 26
12 months or longer, fair value | 0 | 3,492
12 months or longer, unrealized losses | 0 | 4
Commercial paper | Cash and Cash Equivalent |  |
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] |  |
Debt securities AFS, fair value | 3,889 | 0
Commercial paper | Marketable Securities, Current |  |
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] |  |
Debt securities, current | 4,370 | 11,721
Commercial paper | Marketable Securities, Non- Current |  |
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] |  |
Debt securities, non-current | 0 | 0
Corporate notes/bonds |  |
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] |  |
Less than 12 months, fair value | 10,886 | 9,581
Less than 12 months, unrealized losses | 32 | 123
12 months or longer, fair value | 10,235 | 13,815
12 months or longer, unrealized losses | 104 | 232
Corporate notes/bonds | Cash and Cash Equivalent |  |
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] |  |
Debt securities AFS, fair value | 0 | 0
Corporate notes/bonds | Marketable Securities, Current |  |
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] |  |
Debt securities, current | 11,727 | 20,489
Corporate notes/bonds | Marketable Securities, Non- Current |  |
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] |  |
Debt securities, non-current | 9,394 | $ 2,907
U.S. Treasury and Agency Securities |  |
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] |  |
Less than 12 months, fair value | 8,079 |
Less than 12 months, unrealized losses | 14 |
12 months or longer, fair value | 0 |
12 months or longer, unrealized losses | 0 |
U.S. Treasury and Agency Securities | Cash and Cash Equivalent |  |
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] |  |
Debt securities AFS, fair value | 4,299 |
U.S. Treasury and Agency Securities | Marketable Securities, Current |  |
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] |  |
Debt securities, current | 0 |
U.S. Treasury and Agency Securities | Marketable Securities, Non- Current |  |
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items] |  |
Debt securities, non-current | $ 3,780 |

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