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Note 9 - Stock-Based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 18, 2025 | Feb. 20, 2024 | Mar. 15, 2023 | May 31, 2024 | May 31, 2021 | May 31, 2019 | May 31, 2015 | Jun. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Feb. 29, 2024 | Mar. 31, 2023
Share-Based Payment Arrangement, Amount Capitalized |  |  |  |  |  |  |  |  | $ 0 |  | $ 0 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |  |  |  |  |  |  |  |  | 0 | 0 |  |  |
Share Price (in dollars per share) |  |  |  |  |  |  |  |  | $ 1.41 | $ 1.41 |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount |  |  |  |  |  |  |  |  | $ 3,700 | $ 3,700 |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  |  |  |  |  |  |  | 1 year 4 months 24 days |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) |  |  |  |  |  |  |  |  |  | 198,000 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value (in dollars per share) |  |  |  |  |  |  |  |  | $ 2.32 | $ 2.32 | $ 2.84 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  |  |  |  |  |  |  |  | 589,000 |  |  |
Performance Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  |  |  | 4 years |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount |  |  |  |  |  |  |  |  | $ 500 | $ 500 |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  |  |  |  |  |  |  |  | 1 year 7 months 6 days |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) |  |  |  |  |  |  |  |  |  | 75,000 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value (in dollars per share) |  |  |  |  |  |  |  |  | $ 2.26 | $ 2.26 | $ 2.28 | $ 2.28 | $ 3.71
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | [1] |  |  |  |  |  |  |  |  | 151,000 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Target Cap, Percentage |  |  | 100.00% | 100.00% |  |  |  |  |  |  |  |  |
Share-Based Payment Arrangement, Number of Shares Eligible to Vest (in shares) |  |  | 0 |  |  |  |  |  |  |  |  |  |
Annual Revenue Growth Rate, Percentage |  | 200.00% |  |  |  |  |  |  |  |  |  |  |
Performance Shares [Member] | Chief Executive Officer [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  | 223,590 | 223,590 |  |  |  |  |  |  |  |  |
Performance Shares [Member] | Chief Financial Officer [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  | 77,600 | 77,600 |  |  |  |  |  |  |  |  |
Performance Shares [Member] | Share-Based Payment Arrangement, Tranche One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares) |  |  |  |  |  |  |  |  | 0 |  |  |  |
Equity Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) |  |  |  |  |  |  |  | 399,562 | 4,313,156 | 4,313,156 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) |  |  |  |  | 3,600,000 | 3,600,000 | 1,600,000 | 3,000,000 |  |  |  |  |
Equity Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  |  |  | 4 years |  |  |  |
Equity Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Consultant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  |  |  | 1 year |  |  |  |
Equity Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) |  |  |  |  |  |  |  |  | 10 years |  |  |  |
Equity Incentive Plan [Member] | Restricted Stock [Member] | Independent Board Members [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  |  |  | 1 year |  |  |  |
Equity Incentive Plan [Member] | Restricted Stock [Member] | Time Based Vesting [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  |  |  | 3 years |  |  |  |
Equity Incentive Plan [Member] | Restricted Stock [Member] | Performance Based Vesting [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  |  |  | 12 years |  |  |  |
Equity Incentive Plan [Member] | Stock Appreciation Rights (SARs) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  |  |  | 4 years |  |  |  |
Equity Incentive Plan [Member] | Stock Appreciation Rights (SARs) [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) |  |  |  |  |  |  |  |  | 10 years |  |  |  |
[1] | The number of shares presented assumes the achievement of 100% of a target financial performance metric to be determined by the Company’s Compensation Committee and will be subject to an at-risk, performance shares agreement.

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