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Note 12 - Stockholders' Equity (Details Textual) - USD ($) |  |  |  |  | 12 Months Ended | 63 Months Ended
--- | --- | --- | --- | --- | --- | ---
Nov. 07, 2025 | Sep. 30, 2025 | Apr. 09, 2024 | Jun. 01, 2017 | Dec. 31, 2025 | Dec. 31, 2024 | Apr. 30, 2021
Stock Issued During Period, Shares, New Issues (in shares) |  |  |  |  |  |  | 4,553,017
Proceeds from Issuance of Common Stock |  |  |  |  | $ 349,326 | $ 4,648,022 | $ 26,714,403
Shares Issued, Price Per Share (in dollars per share) |  |  |  |  |  |  | $ 5.87
Equity Issuable, Maximum Value |  |  | $ 20,000,000 |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |  |  |  |  | 288,260 |  |
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) |  |  |  |  | $ 5.79 |  |
Share-Based Payment Arrangement, Expense |  |  |  |  | $ 295,871 | $ 325,551 |
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount |  |  |  |  | $ 875,883 |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  |  |  | 1 year 11 months 8 days |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) |  |  |  |  | 15,000 | 0 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) |  |  |  |  | $ 3.13 | $ 1.84 |
President and CEO [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | 74,277 | 75,983 |  |  |  |  |
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) | $ 6.1 | $ 5.9 |  |  |  |  |
The 2017 Stock Option and Incentive Plan [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) |  |  |  |  | 101,000 |  |
The 2017 Stock Option and Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period (Year) |  |  |  |  | 3 years |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) |  |  |  | 10 years |  |  |
The 2025 Plan [Member] |  |  |  |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) | 500,000 |  |  |  |  |  |
At The Market [Member] |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) |  |  |  |  |  | 1,228,227 |
Proceeds from Issuance of Common Stock |  |  |  |  | $ 281,446 | $ 4,356,188 |
Equity Issuable, Maximum, Share (in shares) |  |  | 11,000,000 |  |  |  |
Professional Fees |  |  |  |  |  | 152,272 |
Sales Commissions and Fees |  |  |  |  | $ 10,489 | $ 139,562 |
Sale of Stock, Number of Shares Issued in Transaction (in shares) |  |  |  |  | 63,230 |  |

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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 + Details
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