Note 13 - Stockholders' Equity and Stock-based Compensation - Summary of Stock Options (Details) - $ / shares	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Outstanding, shares, options (in shares)	2,074,505	2,074,505
Outstanding, weighted average exercise price (in dollars per share)	$ 8.51	$ 8.51
Outstanding, options, weighted average grant date fair value (in dollars per share)	$ 1.95	$ 2.11	$ 2.11
Outstanding, weighted average remaining contractual term (Year)	6 years 1 month 6 days	6 years 9 months 18 days	7 years 10 months 24 days
Granted, shares, options (in shares)		0
Granted, weighted average exercise price (in dollars per share)		$ 0
Granted, options, weighted average grant date fair value (in dollars per share)		$ 0
Expired, shares, options (in shares)	(1,742,574)
Expired, weighted average exercise price (in dollars per share)	$ 8.98
Expired, options, weighted average grant date fair value (in dollars per share)	$ 2.14
Outstanding, shares, options (in shares)	331,931	2,074,505	2,074,505
Outstanding, weighted average exercise price (in dollars per share)	$ 6	$ 8.51	$ 8.51
Options vested and exercisable, shares, options (in shares)	331,931
Options vested and exercisable, weighted average exercise price (in dollars per share)	$ 6
Options vested and exercisable, options, weighted average grant date fair value (in dollars per share)	$ 1.95
Options vested and exercisable, weighted average remaining contractual term (Year)	6 years 1 month 6 days

The amount of grant date fair value of options vested and exercisable under share based payment arrangement.

No definition available.

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

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
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-Paragraph 2
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-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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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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

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

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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