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Note 15 - Equity Incentive Plans (Details Textual) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
May 18, 2023
Apr. 19, 2021
Jun. 01, 2015
Dec. 31, 2024
Jun. 30, 2024
Feb. 13, 2020
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number (in shares)       221,392 146,539  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)       83,000    
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)       $ 1.84    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)       20,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)       $ 1.79    
Share-Based Payment Arrangement, Option [Member]            
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount       $ 0.2    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       2 years 3 months 18 days    
Restricted Stock [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)       36,252 24,105  
Restricted Stock Units (RSUs) [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)       565 1,775  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       2 months 12 days    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)       0    
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount       $ 0.1    
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     87,636    
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, Period for Recognition (Year)       2 years 3 months 18 days    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)       20,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)       $ 1.79    
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount       $ 0.9    
The 2015 Plan [Member]            
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)           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)       4    
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)       1 year 6 months    
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)       0    
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount       $ 0.2