Investments - Equity Securities (Details) - USD ($)		3 Months Ended		9 Months Ended
	Sep. 12, 2022	Jan. 31, 2026	Jan. 25, 2025	Jan. 31, 2026	Jan. 25, 2025
Investments
Net gain (loss) recognized during the period on equity securities		$ (1,405,000)	$ 1,454,000	$ 7,446,000	$ 1,187,000
Net gain (loss) recognized during the period on equity securities		$ (1,405,000)	$ 1,454,000	$ 7,446,000	$ 1,187,000
Amprius Technologies, Inc.
Investments
Company Invested amount	$ 5,000,000
Equity securities | Amprius Technologies, Inc.
Investments
Number of shares purchased	500,000
Redeemable warrant | Amprius Technologies, Inc.
Investments
Number of warrants acquired	500,000