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Note 12 - Earnings Per Share (Details Textual) - shares
9 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Share-based Payment Arrangement, Option [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 161,902 290,104
Performance Shares [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 316,445 287,287