Note 11 - Share-based Compensation (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended |
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period (in shares) | | | | 0 | | |
Share-Based Payment Arrangement, Expense | $ 1,623,000 | | $ 806,000 | $ 2,582,000 | $ 1,772,000 | |
Annual Board Service [Member] | Year 2023 [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares) | | | | | | 250,000 |
Annual Board Service [Member] | Year 2024 [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares) | 350,000 | | | | | |
Board Committee Service [Member] | Year 2023 [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) | | | | | | 1 year |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares) | | | | | | 78,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) | | | | | | 10 years |
Share Price (in dollars per share) | | | | | | $ 12.11 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share) | | | | | | $ 3.88 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) (Year) | | | | | | 5 years 3 months |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate | | | | | | 28% |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | | | | | | 4.16% |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares) | | | | 325,709 | | |
Board Committee Service [Member] | Year 2024 [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) | | | | 1 year | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares) | 91,500 | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) | | | | 10 years | | |
Share Price (in dollars per share) | $ 22.25 | | | $ 22.25 | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share) | | | | $ 8.87 | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) (Year) | | | | 5 years 3 months | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate | | | | 32.10% | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | | | | 4.40% | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares) | | | | 110,375 | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares) | 331,125 | | | 331,125 | | |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ 2,900,000 | | | $ 2,900,000 | | |
Chief Executive Officer [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares) | | 400,000 | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) | | | | 10 years | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share) | | | | $ 15.75 | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) (Year) | | | | 6 years | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate | | | | 31% | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | | | | 3.82% | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share) | $ 6.02 | | | $ 6.02 | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares) | 400,000 | | | 400,000 | | |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ 2 | | | $ 2 | | |
Chief Executive Officer [Member] | Share-Based Payment Arrangement, Tranche One [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares) | | | | 133,334 | | |
Chief Executive Officer [Member] | Share-Based Payment Arrangement, Tranche Two [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares) | | | | 133,333 | | |
Chief Executive Officer [Member] | Share-Based Payment Arrangement, Tranche Three [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares) | | | | 133,333 | | |
Chief Executive Officer [Member] | Year 2023 [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares) | | | | | | 400,000 |
Continued Service of the Chairman of the Board [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) | | | | | | 10 years |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share) | | | | | | $ 9.08 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year) (Year) | | | | | | 6 years 1 month 13 days |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate | | | | | | 37% |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate | | | | | | 3.49% |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share) | | | | | | $ 3.94 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares) | 266,666 | | | 266,666 | | |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ 900,000 | | | $ 900,000 | | |
Continued Service of the Chairman of the Board [Member] | Share-Based Payment Arrangement, Tranche One [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares) | | | | | | 133,334 |
Continued Service of the Chairman of the Board [Member] | Share-Based Payment Arrangement, Tranche Two [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares) | | | | | | 133,333 |
Continued Service of the Chairman of the Board [Member] | Share-Based Payment Arrangement, Tranche Three [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares) | | | | | | 133,333 |
Restricted Stock [Member] | | | | | | |
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) | | | | 3 years | | |
Share-Based Payment Arrangement, Expense | 300,000 | | 400,000 | $ 700,000 | 1,200,000 | |
Share-Based Payment Arrangement, Option [Member] | | | | | | |
Share-Based Payment Arrangement, Expense | $ 1,300,000 | | $ 400,000 | $ 1,900,000 | $ 600,000 | |