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Note 2 - Summary of Significant Accounting Policies - Impact of Adopting ASC 606 (Details) - USD ($)
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Oct. 01, 2018
Other current assets $ 49,000 $ 21,000  
Other assets 115,000 280,000  
Accumulated deficit (71,489,000) (61,778,000)  
Sales and Marketing 4,824,000 3,951,000  
Net income/(loss) $ (9,474,000) (7,219,000)  
Basic (in dollars per share) $ (8.09)    
Diluted (in dollars per share) $ (8.09)    
Net loss $ (9,474,000) (7,219,000)  
Other current assets and other assets 116,000 $ 3,000  
Calculated under Revenue Guidance in Effect before Topic 606 [Member]      
Other current assets 76,000    
Other assets 81,000    
Accumulated deficit (71,496,000)    
Sales and Marketing 4,817,000    
Net income/(loss) $ (9,467,000)    
Basic (in dollars per share) $ (8.08)    
Diluted (in dollars per share) $ (8.08)    
Net loss $ (9,467,000)    
Other current assets and other assets 123,000    
Accounting Standards Update 2014-09 [Member]      
Other current assets     $ 59,000
Other assets     27,000
Accumulated deficit     $ 78,000
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]      
Other current assets 27,000    
Other assets (34,000)    
Accumulated deficit (7,000)    
Net income/(loss) (7,000)    
Net loss (7,000)    
Other current assets and other assets $ 7,000