Credit Losses - Schedule of Fair Value and Unrealized Losses on Available for Sale Debt Securities (Detail) - USD ($) $ in Thousands	Jan. 31, 2024	Apr. 30, 2023
Commercial paper
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items]
Less than 12 months, fair value	$ 8,932	$ 8,229
Less than 12 months, unrealized losses	3	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	1,500	0
Commercial paper \| Marketable Securities, Current
Fair Value And Unrealized Losses On Available For Sale Debt Securities [Line Items]
Debt securities, current	7,432	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	0	9,581
Less than 12 months, unrealized losses	0	123
12 months or longer, fair value	7,480	13,815
12 months or longer, unrealized losses	32	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	7,480	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	$ 0	$ 2,907

Fair value and unrealized losses on available for sale debt securities.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as noncurrent.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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