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Note 14 - Share-based Compensation - Restricted Stock Activity (Details) - Restricted Stock Units (RSUs) [Member] - shares
12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Outstanding October 1, 2017 (in shares) 125,000  
Number of Shares Granted (in shares) 218,330  
Released (in shares) (125,000) (125,000)
Forfeited/cancelled (in shares)  
Outstanding September 30, 2018 (in shares) 218,330 125,000