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Note 12 - Common Stock and Stock-based Compensation Plans (Details Textual) - USD ($)
 6 Months Ended
Feb. 10, 2025
Jun. 30, 2025
Chief Financial Officer [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Addtional Shares Issuable, Performance Goals Exceeded 7,268  
Chief Operating Officer [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Addtional Shares Issuable, Performance Goals Exceeded 6,460  
Chief Commercial Officer [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Addtional Shares Issuable, Performance Goals Exceeded 6,460  
Share-Based Payment Arrangement, Option [Member]    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount   $ 195,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition   1 year 8 months 12 days
Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Employee [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period   3 years
Short-Term Executive PSUs [Member] | Chief Executive Officer [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Addtional Shares Issuable, Performance Goals Exceeded, Percentage 100.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Addtional Shares Issuable, Performance Goals Exceeded 51,918  
Short-Term Executive PSUs [Member] | CFO, COO, and CCO [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Addtional Shares Issuable, Performance Goals Exceeded, Percentage 70.00%  
RSUs and PSUs [Member]    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount   $ 29,728
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition   1 year 7 months 6 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period   781,613
Share-Based Payment Arrangement, Tranche One [Member] | Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Nonemployee [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period   1 year
Vesting on February 16, 2025 [Member] | Restricted Stock Units (RSUs) [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 33.40%  
Vesting on February 16, 2026 [Member] | Restricted Stock Units (RSUs) [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 33.30%  
Vesting on February 16, 2027 [Member] | Restricted Stock Units (RSUs) [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 33.30%  
Goals One [Member] | Short-Term Executive PSUs [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage 90.00%  
Goals One [Member] | Short-Term Executive PSUs [Member] | Full Vesting Based on The Achievement of 2022 License Target [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 50.00%  
Goals One [Member] | Short-Term Executive PSUs [Member] | Increase in Eligible PSUs, Percent [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Conditional Increase in Shares, Percentage 7.00%  
Goals One [Member] | Short-Term Executive PSUs [Member] | Chief Executive Officer [Member] | Increase in Eligible PSUs, Percent [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Conditional Increase in Shares, Percentage 10.00%  
Goals One [Member] | Maximum [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Achievement In Excess of 90 Percent [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 99.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage 99.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Actual Performance Results, in Excess of Performance Threshold, Percentage 110.00%  
Goals One [Member] | Minimum [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Achievement In Excess of 90 Percent [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 91.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Actual Performance Results, in Excess of Performance Threshold, Percentage 1.00%  
Goals Two [Member] | Short-Term Executive PSUs [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 25.00%  
Goals Two [Member] | Short-Term Executive PSUs [Member] | Increase in Eligible PSUs, Percent [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Conditional Increase in Shares, Percentage 7.00%  
Goals Two [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Actual Return Being at Least 90 Percent of S&P500 Index [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 25.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage 90.00%  
Goals Two [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Actual Return In Excess of 100 Percent of S&P500 Index [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage 100.00%  
Goals Two [Member] | Short-Term Executive PSUs [Member] | Chief Executive Officer [Member] | Increase in Eligible PSUs, Percent [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Conditional Increase in Shares, Percentage 10.00%  
Goals Two [Member] | Maximum [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Actual Return Being at Least 90 Percent of S&P500 Index [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 99.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage 99.00%  
Goals Two [Member] | Maximum [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Actual Return In Excess of 100 Percent of S&P500 Index [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Actual Performance Results, in Excess of Performance Threshold, Percentage 110.00%  
Goals Two [Member] | Minimum [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Actual Return Being at Least 90 Percent of S&P500 Index [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 91.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage 90.00%  
Goals Two [Member] | Minimum [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Actual Return In Excess of 100 Percent of S&P500 Index [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Actual Performance Results, in Excess of Performance Threshold, Percentage 1.00%  
Goals Three [Member] | Short-Term Executive PSUs [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 25.00%  
Goals Three [Member] | Short-Term Executive PSUs [Member] | Increase in Eligible PSUs, Percent [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Conditional Increase in Shares, Percentage 7.00%  
Goals Three [Member] | Short-Term Executive PSUs [Member] | Full Vesting Based on The Achievement of Positive Shareholder Return [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 25.00%  
Goals Three [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Actual Return Being at Least 90 Percent of Russel 2000 Index [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage 90.00%  
Goals Three [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Actual Return In Excess of 100 Percent of Russel 2000 Index [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage 100.00%  
Goals Three [Member] | Short-Term Executive PSUs [Member] | Chief Executive Officer [Member] | Increase in Eligible PSUs, Percent [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Conditional Increase in Shares, Percentage 10.00%  
Goals Three [Member] | Maximum [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Actual Return Being at Least 90 Percent of Russel 2000 Index [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 99.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage 99.00%  
Goals Three [Member] | Maximum [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Actual Return In Excess of 100 Percent of Russel 2000 Index [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Actual Performance Results, in Excess of Performance Threshold, Percentage 110.00%  
Goals Three [Member] | Minimum [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Actual Return Being at Least 90 Percent of Russel 2000 Index [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 91.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Threshold, Percentage 90.00%  
Goals Three [Member] | Minimum [Member] | Short-Term Executive PSUs [Member] | Vesting Based on Actual Return In Excess of 100 Percent of Russel 2000 Index [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Actual Performance Results, in Excess of Performance Threshold, Percentage 1.00%  
Vesting On February 14, 2026 [Member] | Short-Term Executive PSUs [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 33.40%  
Vesting On February 14, 2027 [Member] | Short-Term Executive PSUs [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 33.30%  
Vesting On February 14, 2028 [Member] | Short-Term Executive PSUs [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 33.30%  
The2011 Stock Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Remaining Vesting Period   36 months
The2011 Stock Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 34,612  
The2011 Stock Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Chief Financial Officer [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 15,575  
The2011 Stock Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Chief Operating Officer [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 13,844  
The2011 Stock Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Chief Commercial Officer [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 13,844  
The2011 Stock Incentive Plan [Member] | Performance Share Units [Member] | Chief Executive Officer [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 51,918  
The2011 Stock Incentive Plan [Member] | Performance Share Units [Member] | Chief Financial Officer [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 10,383  
The2011 Stock Incentive Plan [Member] | Performance Share Units [Member] | Chief Operating Officer [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 9,229  
The2011 Stock Incentive Plan [Member] | Performance Share Units [Member] | Chief Commercial Officer [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period 9,229  
The2011 Stock Incentive Plan [Member] | Maximum [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period   4 years
The2011 Stock Incentive Plan [Member] | Share-Based Payment Arrangement, Tranche Two [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period   1 year
The2011 Stock Incentive Plan [Member] | Vesting After the First Anniversary Grant Date [Member] | Restricted Stock Units (RSUs) [Member] | Share-Based Payment Arrangement, Nonemployee [Member]    
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage 50.00%