Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stockholders' Equity (Details Textual)

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Note 6 - Stockholders' Equity (Details Textual) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 25, 2022
Mar. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Stock Issued During Period, Shares, New Issues   12,622   10,323
Preferred Stock, Par or Stated Value Per Share (in dollars per share)   $ 0.001 $ 0.001 $ 0.001
Tumim [Member]        
Common Stock, Maximum Shares Sold 10,000,000      
Warrants Issued With Placement Agent Agreement [Member]        
Warrants and Rights Outstanding, Term   5 years 5 years  
Class of Warrants and Rights, Number of Securities Called by Warrants or Rights, Percentage of Total Common Stock Issuable Upon Conversion of Preferred Shares   14.50% 14.50%  
Subscription Agreements [Member] | Securities Purchase Agreement [Member]        
Percentage of Proceeds from Issuance of Equity to Redeem Debt Outstanding   50.00%    
Proceeds from Issuance of Preferred Stock Used in Connection With Redemption of Debt   $ 719,000    
Placement Agency Agreement [Member]        
Aggregate Amount Required in Equity Offering for Agent Having Right to Appoint   $ 10,000,000 $ 10,000,000  
Purchase Agreement [Member] | Tumim [Member]        
Stock Issued During Period, Shares, New Issues 50,000      
Stock Issued During Period, Value, New Issues $ 100,000      
Common Stock, Maximum Shares Allowed to Issue and Sell, Initial 7,361,833      
Common Stock, Maximum Shares Allowed to Issue and Sell, Percentage of Shares Issued and Outstanding, Initial 19.99%      
Common Stock, Price Per Share, Percentage of Weighted Average Price 95.00%      
Purchase Agreement [Member] | Tumim [Member] | Minimum [Member]        
Beneficial Ownership, Minimum Percentage of Shares Outstanding, Initial 4.99%      
Purchase Agreement [Member] | Tumim [Member] | Maximum [Member]        
Beneficial Ownership, Minimum Percentage of Shares Outstanding, Initial 9.99%      
Series A Preferred Offerings [Member] | Subscription Agreements [Member]        
Stock Issued During Period, Shares, New Issues     12,622  
Preferred Stock, Stated Value   $ 1,000 $ 1,000  
Preferred Stock, Beneficial Ownership Limitation, Minimum Percentage of Outstanding Preferred Stock Shares Required   51.00% 51.00%  
Preferred Stock, Beneficial Ownership Limitations, Percentage of Outstanding Shares Required to be Converted When Common Stock Volume-weighted Average Price Over Previous 10 Days as Reported Equals More Than 250% of Conversion Price   50.00% 50.00%  
Preferred Stock, Beneficial Ownership Limitations, Percentage of Outstanding Shares Required to be Converted When Common Stock Volume-weighted Average Price Over Previous 10 Days as Reported Equals More Than 300% of Conversion Price   100.00% 100.00%  
Preferred Stock Voting Exceptions, Minimum Amount of Indebtedness Required   $ 5,000,000 $ 5,000,000  
Preferred Stock Dividends, Percentage of Common Shares   20.00% 20.00%  
Series A Preferred Offerings [Member] | Placement Agency Agreement [Member]        
Placement Fee, Percentage of Proceeds from Issuance of Equity   10.00%    
Nonaccountable Expense, Percentage of Proceeds from Issuance of Equity   3.00%    
Series A Preferred Stock [Member]        
Stock Issued During Period, Shares, New Issues       5,359
Series A Preferred Stock [Member] | Subscription Agreements [Member]        
Preferred Stock, Par or Stated Value Per Share (in dollars per share)   $ 0.001 $ 0.001  
Shares Issued, Price Per Share (in dollars per share)   1,000 1,000  
Series A-2 Preferred Stock [Member]        
Stock Issued During Period, Shares, New Issues       1,297
Series A-2 Preferred Stock [Member] | Subscription Agreements [Member]        
Preferred Stock, Par or Stated Value Per Share (in dollars per share)   0.001 0.001  
Shares Issued, Price Per Share (in dollars per share)   1,000 1,000  
Series A-3 Preferred Stock [Member]        
Stock Issued During Period, Shares, New Issues       1,733
Series A-3 Preferred Stock [Member] | Subscription Agreements [Member]        
Preferred Stock, Par or Stated Value Per Share (in dollars per share)   0.001 0.001  
Shares Issued, Price Per Share (in dollars per share)   1,000 1,000  
Series A-4 Preferred Stock [Member]        
Stock Issued During Period, Shares, New Issues       1,934
Series A-4 Preferred Stock [Member] | Subscription Agreements [Member]        
Preferred Stock, Par or Stated Value Per Share (in dollars per share)   0.001 0.001  
Shares Issued, Price Per Share (in dollars per share)   $ 1,000 $ 1,000