Note 16 - Stock Option Plans - Stock Option Activiy (Details) - USD ($) $ / shares in Units, shares in Thousands	12 Months Ended
Jan. 31, 2025	Jan. 31, 2024
Outstanding, number of shares (in shares)	358
Outstanding, weighted average exercise price (in dollars per share)	$ 27.99
Outstanding, weighted average remaining contractual term (Year)	7 years 11 months 4 days	5 years 25 days
Outstanding, intrinsic value	$ 0	$ 0
Granted, number of shares (in shares)	418	0
Granted, weighted average exercise price (in dollars per share)	$ 5.9
Exercised, number of shares (in shares)	0	0
Exercised, weighted average exercise price (in dollars per share)	$ 0
Forfeited, number of shares (in shares)	(7)
Forfeited, weighted average exercise price (in dollars per share)	$ 13.14
Expired, number of shares (in shares)	(148)
Expired, weighted average exercise price (in dollars per share)	$ 33.76
Outstanding, number of shares (in shares)	621	358
Outstanding, weighted average exercise price (in dollars per share)	$ 11.93	$ 27.99
Exercisable, number of shares (in shares)	183
Exercisable, weighted average exercise price (in dollars per share)	$ 26.13
Exercisable, weighted average remaining contractual term (Year)	3 years 7 months 28 days
Exercisable, intrinsic value	$ 0
Nonvested, number of shares (in shares)	438
Nonvested, weighted average exercise price (in dollars per share)	$ 6
Nonvested, weighted average remaining contractual term (Year)	9 years 8 months 19 days
Nonvested, intrinsic value	$ 0

Amount by which the current fair value of the underlying stock exceeds the exercise price of non-vested options.

No definition available.

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

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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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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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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 price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of non-vested options outstanding.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
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-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-4

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Weighted average grant-date fair value of non-vested options outstanding.

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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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Number of share options (or share units) exercised during the current period.

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