Investments - Components (Details) - USD ($) $ in Thousands	Jul. 30, 2022	Apr. 30, 2022
Investments
Total investments	$ 48,965	$ 51,537
Investments to enhance returns on cash
Investments
Total investments	24,914	27,239
Investments to fund compensation/retirement plans
Investments
Total investments	13,972	14,219
Other investments
Investments
Total investments	10,079	10,079
Short-term investments
Investments
Marketable securities	14,787	16,022
Held-to-maturity investments	1,267	1,337
Total investments	16,054	17,359
Long-term investments
Investments
Marketable securities	25,332	26,599
Cost basis investments	7,579	7,579
Total investments	$ 32,911	$ 34,178

Amount of investment in equity security without readily determinable fair value.

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Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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