Annual report pursuant to Section 13 and 15(d)

Note 17 - Share-based Compensation - Performance Unit Activity (Details)

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Note 17 - Share-based Compensation - Performance Unit Activity (Details) - Performance Shares [Member] - $ / shares
3 Months Ended 12 Months Ended
Sep. 30, 2019
Jun. 30, 2020
Nonvested units (in shares) 313,882 313,882
Nonvested, weighted average grant date fair value (in dollars per share) $ 22.82 $ 22.82
Granted (in shares) 99,405 99,405
Granted, weighted average grant date fair value (in dollars per share)   $ 12.72
Vested (in shares)  
Vested, weighted average grant date fair value (in dollars per share)  
Canceled (forfeited) (in shares)   (88,180)
Canceled (forfeited) (in dollars per share)   $ 25.27
Nonvested units (in shares)   325,107
Nonvested, weighted average grant date fair value (in dollars per share)   $ 19.05