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Investments in Marketable Securities - Investments at Amortized Cost and Fair Value (Details) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Gain (Loss) on Securities [Line Items]
Amortized Cost	$ 108,537	$ 138,470
Unrealized Gains	0	0
Unrealized Losses	(9)	0
Fair Value	108,528	138,470
Money market funds
Gain (Loss) on Securities [Line Items]
Amortized Cost	68,165	138,470
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	68,165	138,470
U.S. treasury securities
Gain (Loss) on Securities [Line Items]
Amortized Cost	40,372	0
Unrealized Gains	0	0
Unrealized Losses	(9)	0
Fair Value	$ 40,363	$ 0

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on 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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