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Note 12 - Stockholders' Equity (Details Textual)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 04, 2025
shares
Feb. 01, 2025
Feb. 01, 2024
Nov. 01, 2022
Nov. 30, 2022
$ / shares
shares
Sep. 30, 2025
USD ($)
$ / shares
shares
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
$ / shares
shares
Sep. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
$ / shares
shares
Apr. 11, 2025
USD ($)
Share Price (in dollars per share) | $ / shares         $ 13.05            
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | shares               27,500      
Consultant for Investor Relations Services [Member]                      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares           200,000   200,000      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares           $ 17   $ 17   $ 17  
Warrants and Rights Outstanding, Term (Year)           5 years   5 years      
Warrant, Fair Value, Per Share (in dollars per share) | $ / shares           $ 8.05   $ 8.05      
Warrants and Rights Outstanding           $ 1,600   $ 1,600      
Warrants and Rights Expense               200      
Class of Warrant or Right, Total Compensation Cost Not Yet Recognized               $ 800      
Class of Warrant or Right, Total Compensation Cost, Not yet Recognized, Period for Recognition (Year)               2 years 4 months 24 days      
Intrinsic Value, Shares of Common Stock, Underlying the Exercisable Warrants           $ 0   $ 0      
Consultant for Investor Relations Services [Member] | Measurement Input, Risk Free Interest Rate [Member]                      
Warrants and Rights Outstanding, Measurement Input           3.86   3.86      
Consultant for Investor Relations Services [Member] | Measurement Input, Expected Dividend Rate [Member]                      
Warrants and Rights Outstanding, Measurement Input           0   0      
Consultant for Investor Relations Services [Member] | Measurement Input, Expected Term [Member]                      
Warrants and Rights Outstanding, Measurement Input           2.5   2.5      
Consultant for Investor Relations Services [Member] | Measurement Input, Price Volatility [Member]                      
Warrants and Rights Outstanding, Measurement Input           99.6   99.6      
Restricted Stock Units (RSUs) [Member]                      
Share-Based Payment Arrangement, Expense               $ 35      
Performance Restricted Stock Units (PRSUs) [Member]                      
Share-Based Payment Arrangement, Expense               200      
Restricted Stock [Member]                      
Share-Based Payment Arrangement, Expense               $ 300   $ 400  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)               3 months      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value               $ 200 $ 300    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount           $ 100   100      
Company Equity Incentive Plan [Member]                      
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount           $ 700   $ 700      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) | shares               0      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares) | shares               421,731      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares (in shares) | shares           236,023   236,023      
Company Equity Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]                      
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)               10 years      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)               4 years      
Share-Based Payment Arrangement, Expense           $ 100 $ 200 $ 400 $ 500    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)               4 years      
The 2021 Equity Incentive Plan [Member] | Chief Executive Officer [Member]                      
Stock Issued During Period, Shares, Issued for Services (in shares) | shares 870,000                    
The 2021 Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member]                      
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) | shares         142,500            
The 2021 Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member] | Share-Based Payment Arrangement, Tranche One [Member]                      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage       50.00%              
The 2021 Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member] | Share-Based Payment Arrangement, Tranche Two [Member]                      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage     25.00%                
The 2021 Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member] | Share-Based Payment Arrangement, Tranche Three [Member]                      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage   25.00%                  
The 2021 Equity Incentive Plan [Member] | Performance Restricted Stock Units (PRSUs) [Member] | Chief Executive Officer [Member]                      
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Granted (in shares) | shares                   187,031  
Share-Based Compensation Arrangement by Share-Based Payment, Award, NonOption Equity Instruments, Target Issuable (in shares) | shares         142,500            
Share-Based Compensation Arrangement by Share-Based Payment, Award, NonOption Equity Instruments, Target Issuable Increase (in shares) | shares                   44,531  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | shares               0      
The 2021 Equity Incentive Plan [Member] | Performance Restricted Stock Units (PRSUs) [Member] | Chief Executive Officer [Member] | Minimum [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award Reviewed, Percentage of Grant Date Fair Value       0.00%              
The 2021 Equity Incentive Plan [Member] | Performance Restricted Stock Units (PRSUs) [Member] | Chief Executive Officer [Member] | Maximum [Member]                      
Share-based Compensation Arrangement by Share-based Payment Award Reviewed, Percentage of Grant Date Fair Value       150.00%              
At the Market Issuance [Member]                      
Equity Issuable, Maximum Value                     $ 8,000
Proceeds from Issuance or Sale of Equity               $ 6,600