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Note N - Stock Options (Details Textual) $ / shares in Units, $ in Thousands |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Apr. 30, 2026 | Apr. 29, 2026 | Aug. 08, 2025 shares | Dec. 14, 2023 shares | Jan. 27, 2016 shares | Dec. 31, 2025 USD ($) $ / shares shares | Dec. 31, 2024 USD ($) $ / shares shares | Dec. 31, 2023 $ / shares shares | Dec. 31, 2021 shares
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  |  |  | 33,333 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year) |  |  |  |  |  | 8 months 8 days | 1 year 1 month 20 days | 11 months 15 days |
Share Price (in dollars per share) | $ / shares |  |  |  |  |  | $ 5.4 | $ 17.1 | $ 30 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares) |  |  |  |  |  | 0 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares |  |  |  |  |  | $ 0 | $ 0 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |  |  |  |  |  | 0 | 0 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value | $ |  |  |  |  |  | $ 0 | $ 0 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) |  |  |  |  |  | (0) | (0) |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value | $ |  |  |  |  |  | $ 0 | $ 0 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares) |  |  |  |  |  | 0 | 0 |  |
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $ |  |  |  |  |  |  | $ 0 |  |
In The Money Options [Member] |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares) |  |  |  |  |  | 0 | 0 | 0 |
Forecast [Member] | Reverse Stock Split [Member] |  |  |  |  |  |  |  |  |
Stockholders' Equity Note, Stock Split, Conversion Ratio | 10 | 10 |  |  |  |  |  |  |
The 2023 Stock Incentive Plan [Member] |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) |  |  | 70,000 |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares) |  |  |  |  |  | 28,300 |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited (in shares) |  |  |  |  |  | 3,026 |  |  |
Stock Issued During Period, Shares, Issued for Services (in shares) |  |  |  |  |  | 2,316 |  |  |
The 2023 Stock Incentive Plan [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent |  |  |  | 100.00% |  |  |  |  |
The 2023 Stock Incentive Plan [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent |  |  |  | 110.00% |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year) |  |  |  | 10 years |  |  |  |  |
The 2015 Equity Incentive Plan [Member] |  |  |  |  |  |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  |  |  |  | 1,042 |  |  |  | 4,383
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) |  |  |  |  | 10 years |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |  |  |  |  |  | 0 | 0 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) |  |  |  |  |  | (0) | (0) |  |
The 2015 Equity Incentive Plan [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent |  |  |  |  |  |  |  |  | 100.00%
The 2015 Equity Incentive Plan [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent |  |  |  |  |  |  |  |  | 110.00%

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