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Note 15 - Equity Incentive Plans (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended 12 Months Ended
May 18, 2023
Apr. 19, 2021
Jun. 01, 2015
Dec. 31, 2023
Dec. 31, 2023
Jun. 30, 2023
Feb. 13, 2020
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)       149,087 149,087 52,762  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)       $ 1.73      
Share-Based Payment Arrangement, Option [Member]              
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount       $ 0.4 $ 0.4    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       1 year 10 months 6 days      
Restricted Stock [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)       37,929 37,929 38,075  
Restricted Stock Units (RSUs) [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)       2,898 2,898 4,963  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount       $ 0.1 $ 0.1    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)         1 year 2 months 12 days    
The 2023 Equity Incentive Plan [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares) 200,000            
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) 87,129            
The 2023 Equity Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) 10 years            
The 2023 Equity Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Minimum [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 3 years            
The 2023 Equity Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Maximum [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 4 years            
The 2023 Equity Incentive Plan [Member] | Restricted Stock and Restricted Stock Units (RSUs) [Member] | Minimum [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 3 years            
The 2023 Equity Incentive Plan [Member] | Restricted Stock and Restricted Stock Units (RSUs) [Member] | Maximum [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 4 years            
The 2023 Equity Incentive Plan [Member] | Restricted Stock [Member]              
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount       $ 2.0 $ 2.0    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       1 year 10 months 24 days      
The 2015 Plan [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)       179,732 179,732    
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)     150,000       250,000
The 2015 Plan [Member] | Share-Based Payment Arrangement, Option [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)     10 years        
The 2015 Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Minimum [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)     3 years        
The 2015 Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Maximum [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)     4 years        
The 2015 Plan [Member] | Restricted Stock [Member] | Minimum [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)     4 years        
The 2015 Plan [Member] | Restricted Stock [Member] | Maximum [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)     10 years        
The 2015 Plan [Member] | Restricted Stock Units (RSUs) [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)     4 years        
Neos 2015 Plan [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)   5,272          
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)   3,486          
Neos 2015 Plan [Member] | Share-Based Payment Arrangement, Option [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)   10 years          
Neos 2015 Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Minimum [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)   1 year          
Neos 2015 Plan [Member] | Share-Based Payment Arrangement, Option [Member] | Maximum [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)   4 years          
Neos 2015 Plan [Member] | Restricted Stock Units (RSUs) [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)   1,786          
Outside Equity Incentive Plan [Member] | Restricted Stock [Member]              
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)       2,088 2,088    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount       $ 0.3 $ 0.3    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       1 year 1 month 6 days