Quarterly report [Sections 13 or 15(d)]

Note 6 - Stockholders' Equity and Equity-linked Instruments (Details Textual)

v3.25.1
Note 6 - Stockholders' Equity and Equity-linked Instruments (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Feb. 14, 2025
Jan. 31, 2025
Sep. 30, 2024
Dec. 31, 2023
Mar. 31, 2025
Sep. 30, 2023
Dec. 31, 2024
Nov. 30, 2023
Aug. 23, 2023
May 29, 2023
Preferred Stock, Shares Authorized (in shares)         10,000,000   10,000,000     5,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)         $ 0.001   $ 0.001      
Total Capital, Shares Authorized         110,000,000          
Common Stock, Shares Authorized (in shares)         400,000,000   400,000,000     100,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)         $ 0.001   $ 0.001      
Preferred Stock, Stated Value         $ 1,000          
Preferred Stock, Shares Outstanding (in shares)         16,669   17,499      
Stock Issued During Period, Shares, New Issues   262,501         262,501      
Conversion of Series A and AA to Series AAA [Member]                    
Conversion of Stock, Shares Converted         6,367          
Converted to Common stock (in shares)         6,367          
Series AAA-3 & AAA-4 Junior Subscription Agreements [Member]                    
Stock Issued During Period, Shares, New Issues     1,096              
Proceeds from Issuance or Sale of Equity     $ 1,096,000              
Equity Purchase Agreement [Member]                    
Stock Issued During Period, Shares, New Issues 300,000       717,000          
Shares Issued, Price Per Share (in dollars per share)         $ 0.34          
Equity Offering, Maximum Amount $ 2,900,000                  
Stock Issued During Period, Value, New Issues $ 159,000                  
Equity Offering, Maximum Shares to be Issued (in shares) 3,319,323                  
Equity Offering, Maximum Percentage of Outstanding 19.99%                  
Maximum Beneficial Ownership 4.99%                  
Equity Offering, Price Per Share, Percentage of Closing Price 92.00%                  
Proceeds from Issuance of Common Stock         $ 231,000          
Series A A Preferred Stock [Member]                    
Preferred Stock, Shares Outstanding (in shares)         3,699     7,322 10,706  
Preferred Stock, Convertible, Conversion Price                 $ 2.6  
Deemed Dividend on Preferred Stock           $ 6,446,000        
Series A A Preferred Stock [Member] | Subscription Agreements [Member]                    
Preferred Stock, Par or Stated Value Per Share (in dollars per share)         $ 0.001          
Preferred Stock, Convertible, Conversion Price         $ 2.12          
Preferred Stock, Period After Registration Agreement for Conversion         18 months          
Equity, Minimum Preferred Stock Purchased         $ 3,500,000          
Preferred Stock, Convertible, Conversion Percentage         125.00%          
Rights To Purchase, Number Of Preferred Stocks (in shares)         17,832          
Preferred Stock, Convertible, Shares Issuable (in shares)         8,414,537          
Series AAA-3 Junior Preferred Stock [Member]                    
Preferred Stock, Shares Outstanding (in shares)         697          
Series AAA-3 Junior Preferred Stock [Member] | Series AAA-3 & AAA-4 Junior Subscription Agreements [Member]                    
Stock Issued During Period, Shares, New Issues       4,011            
Series AAA-4 Junior Preferred Stock [Member]                    
Preferred Stock, Shares Outstanding (in shares) [1],[2],[3],[4],[5]         399          
Series AAA-4 Junior Preferred Stock [Member] | Series AAA-3 & AAA-4 Junior Subscription Agreements [Member]                    
Stock Issued During Period, Shares, New Issues         2,356          
Series A Preferred Offerings [Member] | Subscription Agreements [Member]                    
Preferred Stock, Stated Value         $ 1,000          
Preferred Stock, Conversion Period With Discretion         1 year          
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%          
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%          
Preferred Stock, Automatic Conversion Period         24 months          
Preferred Stock, Percentage Consent Needed to Convert         51.00%          
Preferred Stock Dividends, Percentage of Common Shares         20.00%          
Preferred Stock Dividends, Period One         12 months          
Preferred Stock Dividends, Period Two         24 months          
Preferred Stock Dividends, Period Three         90 days          
Preferred Stock, Maximum Loans         $ 5,000,000          
Preferred Stock Voting Exceptions, Minimum Amount of Indebtedness Required         $ 5,000,000          
Series AAA Junior Preferred Stock [Member]                    
Preferred Stock, Shares Outstanding (in shares)         365          
Series AAA Junior Preferred Stock [Member] | Subscription Agreements [Member]                    
Preferred Stock Dividends, Percentage of Common Shares         20.00%          
Preferred Stock Dividends, Period One         30 days          
Preferred Stock Dividends, Period Two         60 days          
Subscription Agreements [Member] | Series AAA Convertible Preferred Stock [Member]                    
Preferred Stock, Period After Registration Agreement for Conversion         18 months          
Preferred Stock, Down Round Feature, Period After Filing Date         24 months          
Series AAA Convertible Preferred Stock [Member]                    
Preferred Stock, Shares Outstanding (in shares)         7,345          
Series AAA Convertible Preferred Stock [Member] | Subscription Agreements [Member]                    
Preferred Stock, Stated Value         $ 1,000          
Warrants Issued With Placement Agent Agreement [Member]                    
Warrants and Rights Outstanding, Term         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%          
Placement Agent Warrants With Series A-2 Preferred Stock [Member]                    
Class of Warrant or Right, Exchanged During Period (in shares)         88,403          
Stock Issued During Period, Shares, Warrant Exchange (in shares)         199,778          
Shares Issued, Price Per Share (in dollars per share)         $ 1.71          
Placement Agent Warrants With Series A-2 Preferred Stock [Member] | Minimum [Member]                    
Class of Warrant or Right, Exchanged During Period, Exercise Price (in dollars per share)         7.6          
Placement Agent Warrants With Series A-2 Preferred Stock [Member] | Maximum [Member]                    
Class of Warrant or Right, Exchanged During Period, Exercise Price (in dollars per share)         $ 13.41          
New Placement Agent Warrants [Member]                    
Class of Warrant or Right, Exchanged During Period (in shares)         347,428          
Class of Warrant or Right, Exchanged During Period, Exercise Price (in dollars per share)         $ 1.674          
Series AAA-3 & AAA-4 Junior Subscription Agreements [Member] | Series AAA-3 and AAA-4 Junior Preferred Stock Warrants [Member]                    
Class of Warrant or Right, Exchanged During Period, Exercise Price (in dollars per share)     $ 1              
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right     1,000              
Class of Warrant or Right, Issued During Period, Purchase Price     $ 1,000              
[1] As adjusted to reflect reduction in conversion prices as a result of the Series AA Down Round Feature, described below.
[2] Series AAA and Series AAA-2 totals include 4,011 and 2,356 preferred shares, respectively, issued in connection with the Exchange Agreements described below.
[3] The Conversion price for Series AA Preferred Stock outstanding as of August 23, 2023, totaling 10,706 shares of Series AA Preferred Stock, was adjusted to $2.60 as a result of the Series AA Down Round Feature described below.
[4] The Conversion prices for the Series AA Preferred Stock outstanding as of November 30, 2023, totaling 7,322 shares of Series AA Preferred Stock, were adjusted to the conversion prices shown in the table above, as a result of the Series AA Down Round Feature described below.
[5] The triggering of the Down Round Feature for the Series AA Preferred Stock, occurring in August 2023, resulted in a deemed dividend totaling $6,446,000, which was charged to retained earnings in the September 30, 2023 consolidated balance sheet.