Equity Incentive Plans - Outstanding Common Stock Options and Related Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
Shares Subject to Outstanding Options
Beginning balance of options outstanding (shares)	70,853	793,314	876,284
Exercised (shares)	0	0	(7,638)
Expired (shares)	(35,568)	(722,461)	(75,332)
Ending balance of options outstanding (shares)	35,285	70,853	793,314	876,284
Weighted- Average Exercise Price per Share
Options outstanding, weighted average exercise price (in usd per share)	$ 36.06	$ 26.52	$ 26.40
Options exercised, weighted average exercise price (in usd per share)	0	0	8.40
Options expired, weighted average exercise price (in usd per share)	44.37	25.59	26.95
Options outstanding, weighted average exercise price (in usd per share)	$ 27.68	$ 36.06	$ 26.52	$ 26.40
Additional disclosures
Options outstanding, weighted average remaining contractual term	8 months 12 days	1 year 8 months 12 days	1 year	1 year 10 months 24 days
Options outstanding, aggregate intrinsic value	$ 0	$ 0	$ 0	$ 59

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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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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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 option holders acquired shares when converting their stock options into shares.

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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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