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Note 11 - Stockholders' Equity - Summary of Changes in Stockholders' Equity (Details) - USD ($)
3 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Balances $ 34,570,885  
Share-based compensation expense 464,749  
Other comprehensive loss (6,310) $ (4,208)
Net loss (812,680) $ (380,073)
Balances $ 34,216,644  
Common Stock [Member]    
Balances (in shares) 31,800,103  
Balances $ 318  
Balances (in shares) 31,800,103  
Balances $ 318  
Additional Paid-in Capital [Member]    
Balances 86,467,215  
Share-based compensation expense 464,749  
Balances 86,931,964  
Retained Earnings [Member]    
Balances (51,895,099)  
Net loss (812,680)  
Balances (52,707,779)  
AOCI Attributable to Parent [Member]    
Balances (1,549)  
Other comprehensive loss (6,310)  
Balances $ (7,859)