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Note 13 - Share-based Compensation (Details Textual) - USD ($) $ in Millions |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
May 18, 2022 | Dec. 03, 2021 | Dec. 31, 2025 | Dec. 31, 2024 | Jul. 31, 2025 | May 22, 2024 | Dec. 31, 2023
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  |  | 8,641,160 |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount |  |  | $ 10.6 |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition |  |  | 3 years 1 month 6 days |  |  |  |
Share-Based Payment Arrangement, Option [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares) |  |  | 6,864,854 | 4,692,438 |  |  | 3,871,013
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) |  |  | 415,253 | 117,000 |  |  |
Deferred Share Units [Member] |  |  |  |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  |  | 174,515 |  |  |  |
The 2019 Omnibus Incentive Plan [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) |  |  |  |  |  | 7,000,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares) |  |  | 5,402,444 |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  |  | 164,770 |  |  |  |
The 2019 Omnibus Incentive Plan [Member] | Employee and Non-employee Stock Options [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) | 10 years |  |  |  |  |  |
The 2019 Omnibus Incentive Plan [Member] | Employee and Non-employee Stock Options [Member] | Minimum [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) | 1 year |  |  |  |  |  |
The 2019 Omnibus Incentive Plan [Member] | Employee and Non-employee Stock Options [Member] | Maximum [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) | 4 years |  |  |  |  |  |
The 2019 Omnibus Incentive Plan [Member] | Nonemployee Stock Options [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) | 5 years |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) | 1 year |  |  |  |  |  |
The 2021 Employment Inducement Incentive Plan [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) |  | 10 years |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares) |  |  | 1,100,000 |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  | 1,000,000 |  |  | 2,000,000 |  |
Stock Option Prior Plan [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares) |  |  | 362,410 |  |  |  |
The 2012 DSU Plan [Member] |  |  |  |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  |  | 9,745 |  |  |  |
The 2019 Omnibus Incentive Plan, Stock Option Prior Plan, and the 2012 DSU Plan [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value |  |  | $ 2.6 | $ 1.5 |  |  |
Non-employee Director Compensation Program [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) |  |  |  | 1 year |  |  |
Non-employee Director Compensation Program [Member] | Deferred Share Units [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period |  |  | 174,515 | 284,886 |  |  |
Non-employee Director Compensation Program [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture |  |  | 35,215 | 23,660 |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number |  |  | 0 | 0 |  |  |
Non-employee Director Compensation Program [Member] | Deferred Share Unit Plan [Member] |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number |  |  | 0 | 0 |  |  |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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