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Note 7 - Stock Based Compensation - Summary of Restricted Stock Activity (Details) - $ / shares
 9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Vested, shares (in shares) (13,000) (13,000)
Restricted Stock [Member]    
Non-vested, shares (in shares) 196  
Non-vested, Weighted average grant date price (in dollars per share) $ 11.26  
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) 160  
Granted, Weighted average grant date price (in dollars per share) $ 16.04  
Vested, shares (in shares) (127)  
Vested, Weighted average grant date price (in dollars per share) $ 11.28  
Non-vested, shares (in shares) 229 196
Non-vested, Weighted average grant date price (in dollars per share) $ 14.59 $ 11.26