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Note 10 - Stock-based Compensation Stock (Details Textual)	1 Months Ended		12 Months Ended
	Oct. 31, 2025 shares	Jun. 30, 2025 shares	Dec. 31, 2025 USD ($) shares	Dec. 31, 2024 USD ($) shares	Jan. 01, 2025 shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross			466,600
Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross			0	39,721
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $			$ 1,900,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			2 years
Stock Option Vesting Terms As Improbable to Probable [Member] | Chief Financial Officer [Member]
Share-Based Payment Arrangement, Plan Modification, Incremental Cost | $				$ 300,000
Share-Based Payment Arrangement, Accelerated Cost | $			$ 12,000
Stock Option Vesting Terms As Improbable to Probable [Member] | Chief Operating Officer [Member]
Share-Based Payment Arrangement, Plan Modification, Incremental Cost | $			200,000
Share-Based Payment Arrangement, Accelerated Cost | $			$ 100,000
Equity Incentive Plan 2015 [Member]
Percentage of Total Shares Eligible for Plan Reserve, On an Annual Basis			4.00%
Share Based Compensation Arrangement By Share Based Payment Award, Number of Shares Available for Grant, Increase (in shares)					348,109
The 2018 Employee, Director and Consultant Equity Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)			0
The 2018 Employee, Director and Consultant Equity Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period			10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period			4 years
The 2018 Employee, Director and Consultant Equity Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period			1 year
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage			25.00%
Inducement Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period	10 years	10 years		10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period	36 months	36 months		36 months
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross	75,000	54,000		71,712
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Employees				5
The 2025 Equity Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)			735,200

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The percentage of total shares within the plan that may be added to the plan reserve, occurring on an annual basis.

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-Section 50
-Paragraph 2
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