Annual report pursuant to Section 13 and 15(d)

Note 14 - Shareholders' Equity - Stock Retired and Repurchased (Details)

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Note 14 - Shareholders' Equity - Stock Retired and Repurchased (Details) - USD ($)
 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Treasury Stock, Shares, Acquired (in shares) 1,538,363    
Treasury Stock, Value, Acquired, Cost Method $ 24,319,000 $ 0  
Share Repurchase Program [Member]      
Treasury Stock, Shares, Acquired (in shares) 1,538,363 950,484
Treasury Stock, Value, Acquired, Cost Method $ 24,319,044 $ 22,019,381
Average price per share (in dollars per share) $ 15.81 $ 23.17