Note 6 - Common Stock Options (Details Textual) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended
Mar. 31, 2026 USD ($) $ / shares shares
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount \| $	$ 284
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	9 months 14 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number \| shares	5.2
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price \| $ / shares	$ 7.59
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted-Average Remaining Contractual Term	5 years 3 months 18 days
The Plan [Member] \| Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)	10 years

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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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.

+ References

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-Topic 718
-SubTopic 10
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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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Period from grant to expiration date of share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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

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