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Note 13 - Subsequent Events (Details Textual)
12 Months Ended
Nov. 16, 2022
USD ($)
$ / shares
shares
Jul. 27, 2021
USD ($)
shares
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Stock Issued During Period, Value, New Issues   $ 3,500,000 $ 4,016,000 $ 3,517,000
Stock Issued During Period, Shares, New Issues (in shares) | shares   945,946    
Board of Directors Chairman [Member]        
Stock Issued During Period, Value, New Issues   $ 1,250,000    
Stock Issued During Period, Shares, New Issues (in shares) | shares   337,838    
Subsequent Event [Member] | Board of Directors Chairman [Member] | Warrant With Subscription Agreement [Member]        
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares 511,765      
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares $ 1.02      
Subsequent Event [Member] | Board of Directors Chairman [Member] | Stock With Subscription Agreement [Member]        
Stock Issued During Period, Value, New Issues $ 1,200,000      
Stock Issued During Period, Shares, New Issues (in shares) | shares 1,176,471      
Loan and Security Agreement [Member] | Subsequent Event [Member]        
Debt Instrument, Face Amount $ 5,500,000      
Debt Instrument, Interest Rate, Stated Percentage 12.00%      
Debt Instrument, Number of Equal Installment 30      
Debt Instrument, Fee, Percent 2.00%      
Debt Instrument, Loan Premium, Percent of Loan Amount 20.00%      
Debt Instrument, Covenant, 6-month Billings Requirement, Tranche 1 $ 12,000,000      
Debt Instrument, Covenant, 6-month Billings Requirement, Tranche 2 11,000,000      
Debt Instrument, Covenant, 6-month Billings Requirement, Tranche 3 12,000,000      
Debt Instrument, Covenant, 6-month EBITDA Burn Requirement, Tranche 2 6,500,000      
Debt Instrument, Covenant, 6-month EBITDA Burn Requirement, Tranche 3 $ 7,000,000      
Loan and Security Agreement [Member] | Subsequent Event [Member] | Minimum [Member]        
Debt Instrument, Covenant, Debt Coverage Ratio 1.15      
Loan and Security Agreement [Member] | Subsequent Event [Member] | Maximum [Member]        
Debt Instrument, Covenant, 6-month EBITDA Burn Requirement, Tranche 1 $ 6,000,000      
Security Agreement and Promissory Note [Member] | Subsequent Event [Member] | Board of Directors Chairman [Member]        
Debt Instrument, Face Amount $ 3,000,000