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Note 7 - Share-based Compensation (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2021
Mar. 09, 2017
Share-Based Payment Arrangement, Expense $ 496 $ 2,063      
Long-term Incentive Awards [Member] | Senior Management [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value   37,000      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount   $ 60,000      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition   3 years 21 days      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other Than Options, Aggregate Value, Granted       $ 79,225,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Settled in Shares, Percentage       25.00%  
Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Settled In Cash Or Shares, Percentage       75.00%  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period   3,486      
Share-Based Payment Arrangement, Expense   $ (153,000) $ 13,000    
The 2017 Omnibus Incentive Plan [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)         5,277,197
The 2017 Omnibus Incentive Plan [Member] | Restricted Stock [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value 5,000 0      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount $ 1,000 $ 128,000      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 2 months 15 days 4 months 28 days      
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period   3,000 (0)    
The 2017 Omnibus Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value   $ 246,000 $ 1,412,000    
SEED 2022 Share Incentive Plan [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value   23,000 $ 88,000    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount   $ 354,000      
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition   1 year 3 months 25 days      
Share-Based Payment Arrangement, Expense $ 225,000 $ 192,000      
SEED 2022 Share Incentive Plan [Member] | Minimum [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)   4 years      
SEED 2022 Share Incentive Plan [Member] | Maximum [Member]          
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)   5 years