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Equity Incentive Plans - Outstanding Common Stock Options and Related Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 30, 2025	Jan. 31, 2025
Shares Subject to Outstanding Options
Outstanding (shares)	70,853
Expired (in shares)	(196)
Outstanding (shares)	70,657	70,853
Weighted- Average Exercise Price per Share
Options outstanding, weighted average exercise price (in usd per share)	$ 36.06
Options expired, weighted average exercise price (in usd per share)	50.85
Options outstanding, weighted average exercise price (in usd per share)	$ 36.02	$ 36.06
Additional disclosures
Options outstanding, weighted average remaining contractual term	1 year 4 months 24 days	1 year 8 months 12 days
Options outstanding, aggregate intrinsic value	$ 0	$ 0

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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