Summary of Significant Accounting Policies - Investments (Details) - USD ($)	6 Months Ended
	Jul. 31, 2023	Oct. 31, 2023	Jan. 31, 2023
Summary of Investment Holdings [Line Items]
Fair Value		$ 0	$ 104,966,000
Accrued interest receivable			500,000
U.S. Treasury securities
Summary of Investment Holdings [Line Items]
Amortized Cost			105,415,000
Gross Unrealized Gains	$ 0
Gross Unrealized Losses	$ (449,000)
Fair Value			$ 104,966,000