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Note 5 - Supplemental Disclosure for Earnings Per Share (Details Textual) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Restricted Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 22,350 0 22,350 0