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Note 16 - Share-Based Compensation (Details Textual) - USD ($) $ in Millions |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 26, 2025 | Aug. 06, 2024 | Sep. 07, 2023 | Jun. 08, 2022 | Jun. 07, 2021 | Jun. 08, 2020 | Oct. 12, 2018 | Jan. 01, 2018 | Jun. 30, 2024 | Dec. 31, 2021 | Mar. 31, 2017 | Mar. 31, 2026 | May 31, 2019
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  |  |  |  |  |  |  |  |  |  |  | 5,356,440 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) |  |  |  |  |  |  |  |  |  |  |  | 2,052,792 |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |  |  |  |  |  |  |  |  |  |  |  | $ 39.1 |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |  |  |  |  |  |  |  |  |  |  |  | 2 years 2 months 23 days |
Share-Based Payment Arrangement, Option [Member] | Share-Based Payment Arrangement, Tranche One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  |  |  |  |  |  |  |  |  |  | 33.00% |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  |  |  |  |  | 2 years |  |
Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Tranche One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage |  |  |  |  |  |  |  |  |  |  | 33.00% |  |
Performance Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) |  |  |  |  |  |  |  |  |  |  |  | 336,411 |
Share-based Compensation Arrangement by Share-based Payment Award, Options and Equity Instruments Other than Options, Grants in Period, Grant Date Fair Value |  |  |  |  |  |  |  |  |  |  |  | $ 6.6 |
Share Option Plan [Member] | Share-Based Payment Arrangement, Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  |  |  |  |  |  |  |  |  |  | 3 years |  |
Share-based Compensation Arrangement By Share-based Payment Award, Individual Voting Powers, Percentage |  |  |  |  |  |  |  |  |  |  | 10.00% |  |
Two Thousand Seventeen Equity Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) | 8,750,167 | 6,000,167 | 5,200,167 | 4,750,167 | 4,350,167 | 3,950,167 | 3,550,167 | 1,650,167 |  |  | 1,400,000 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares) | 2,750,000 | 800,000 | 450,000 | 400,000 | 400,000 | 400,000 | 1,900,000 | 250,167 |  |  |  |  |
The 2019 Inducement Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares) |  |  |  |  |  |  |  |  | 1,800,000 |  |  |  | 900,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized (in shares) |  |  |  |  |  |  |  |  | 600,000 | 300,000 |  |  |
Maximum [Member] | Share Option Plan [Member] | Share-Based Payment Arrangement, Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year) |  |  |  |  |  |  |  |  |  |  | 10 years |  |
Minimum [Member] | Share Option Plan [Member] | Share-Based Payment Arrangement, Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent |  |  |  |  |  |  |  |  |  |  | 100.00% |  |
Share-based Compensation Arrangement By Share-based Payment Award, Percentage of Purchase Price for Individuals Having More than Ten Percent of Combined Voting Power |  |  |  |  |  |  |  |  |  |  | 110.00% |  |

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