Quarterly report [Sections 13 or 15(d)]

Note 6 - Stockholders' (Deficit) Equity and Equity-linked Instruments - Schedule of Preferred Stock (Details)

v3.25.2
Note 6 - Stockholders' (Deficit) Equity and Equity-linked Instruments - Schedule of Preferred Stock (Details) - USD ($)
 1 Months Ended 6 Months Ended 12 Months Ended
Jan. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Nov. 30, 2023
Aug. 23, 2023
Shares Purchased/ Issued in Exchange (in shares) 6,563   6,563    
Preferred Stock, Shares Outstanding (in shares)   16,426 17,499    
Gross Proceeds   $ 35,615,000      
Fees   4,420,000      
Net Proceeds   $ 31,195,000      
Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   46,000      
Preferred Stock Converted to Preferred Stock [Member]          
Shares Purchased/ Issued in Exchange (in shares) [2]   41,982      
Conversions / Exchanges (in shares)   (25,556)      
Converted to Common stock (in shares)   25,556      
Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   (246,000)      
Original (in shares)   455,000      
Conversion of preferred stock to common stock (in shares) [3]   (209,000)      
Converted to Common stock (in shares)   246,000      
Series A Preferred Stock [Member]          
Conversion Prices (in dollars per share) [4],[5],[6],[7]   $ 496.4      
Preferred Stock, Shares Outstanding (in shares)   0      
Gross Proceeds   $ 5,359,000      
Fees   697,000      
Net Proceeds   $ 4,662,000      
Series A Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   2,000      
Series A Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Shares Purchased/ Issued in Exchange (in shares) [2]   5,359      
Conversions / Exchanges (in shares)   (5,359)      
Converted to Common stock (in shares)   5,359      
Series A Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   0      
Original (in shares)   11,000      
Conversion of preferred stock to common stock (in shares) [3]   (11,000)      
Converted to Common stock (in shares)   0      
Series A-2 Preferred Stock [Member]          
Conversion Prices (in dollars per share) [4],[5],[6],[7]   $ 531.6      
Preferred Stock, Shares Outstanding (in shares)   0      
Gross Proceeds   $ 1,297,000      
Fees   169,000      
Net Proceeds   $ 1,128,000      
Series A-2 Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   0      
Series A-2 Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Shares Purchased/ Issued in Exchange (in shares) [2]   1,297      
Conversions / Exchanges (in shares)   (1,297)      
Converted to Common stock (in shares)   1,297      
Series A-2 Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   0      
Original (in shares)   2,000      
Conversion of preferred stock to common stock (in shares) [3]   (2,000)      
Converted to Common stock (in shares)   0      
Series A-3 Preferred Stock [Member]          
Conversion Prices (in dollars per share) [4],[5],[6],[7]   $ 536.4      
Preferred Stock, Shares Outstanding (in shares)   0      
Gross Proceeds   $ 1,733,000      
Fees   225,000      
Net Proceeds   $ 1,508,000      
Series A-3 Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   0      
Series A-3 Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Shares Purchased/ Issued in Exchange (in shares) [2]   1,733      
Conversions / Exchanges (in shares)   (1,733)      
Converted to Common stock (in shares)   1,733      
Series A-3 Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   0      
Original (in shares)   3,000      
Conversion of preferred stock to common stock (in shares) [3]   (3,000)      
Converted to Common stock (in shares)   0      
Series A-4 Preferred Stock [Member]          
Conversion Prices (in dollars per share) [4],[5],[6],[7]   $ 304      
Preferred Stock, Shares Outstanding (in shares)   0      
Gross Proceeds   $ 1,934,000      
Fees   251,000      
Net Proceeds   $ 1,683,000      
Series A-4 Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   1,000      
Series A-4 Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Shares Purchased/ Issued in Exchange (in shares) [2]   1,934      
Conversions / Exchanges (in shares)   (1,934)      
Converted to Common stock (in shares)   1,934      
Series A-4 Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   0      
Original (in shares)   6,000      
Conversion of preferred stock to common stock (in shares) [3]   (6,000)      
Converted to Common stock (in shares)   0      
Series A-5 Preferred Stock [Member]          
Conversion Prices (in dollars per share) [4],[5],[6],[7]   $ 443.6      
Preferred Stock, Shares Outstanding (in shares)   0      
Gross Proceeds   $ 2,299,000      
Fees   299,000      
Net Proceeds   $ 2,000,000      
Series A-5 Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   1,000      
Series A-5 Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Shares Purchased/ Issued in Exchange (in shares) [2]   2,299      
Conversions / Exchanges (in shares)   (2,299)      
Converted to Common stock (in shares)   2,299      
Series A-5 Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   0      
Original (in shares)   5,000      
Conversion of preferred stock to common stock (in shares) [3]   (5,000)      
Converted to Common stock (in shares)   0      
Series A A Preferred Stock [Member]          
Preferred Stock, Shares Outstanding (in shares)   3,639   7,322 10,706
Gross Proceeds   $ 7,680,000      
Fees   966,000      
Net Proceeds   $ 6,714,000      
Price As Adjusted, Conversions (in dollars per share)   $ 75.6      
Series A A Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   3,000      
Series A A Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Conversion Prices (in dollars per share)   $ 377.2      
Shares Purchased/ Issued in Exchange (in shares) [2]   7,680      
Conversions / Exchanges (in shares)   (4,041)      
Converted to Common stock (in shares)   4,041      
Series A A Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   (48,000)      
Original (in shares)   102,000      
Conversion of preferred stock to common stock (in shares) [3]   (54,000)      
Converted to Common stock (in shares)   48,000      
Series AA-2 Convertible Preferred Stock [Member]          
Preferred Stock, Shares Outstanding (in shares)   0      
Gross Proceeds   $ 1,500,000      
Fees   130,000      
Net Proceeds   $ 1,370,000      
Price As Adjusted, Conversions (in dollars per share)   $ 83.6      
Series AA-2 Convertible Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   0      
Series AA-2 Convertible Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Conversion Prices (in dollars per share)   $ 417.2      
Shares Purchased/ Issued in Exchange (in shares) [2]   1,500      
Conversions / Exchanges (in shares)   (1,500)      
Converted to Common stock (in shares)   1,500      
Series AA-2 Convertible Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   0      
Original (in shares)   18,000      
Conversion of preferred stock to common stock (in shares) [3]   (18,000)      
Converted to Common stock (in shares)   0      
Series AA-3 Convertible Preferred Stock [Member]          
Preferred Stock, Shares Outstanding (in shares)   25      
Gross Proceeds   $ 1,025,000      
Fees   133,000      
Net Proceeds   $ 892,000      
Price As Adjusted, Conversions (in dollars per share)   $ 76      
Series AA-3 Convertible Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   0      
Series AA-3 Convertible Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Conversion Prices (in dollars per share)   $ 380      
Shares Purchased/ Issued in Exchange (in shares) [2]   1,025      
Conversions / Exchanges (in shares)   (1,000)      
Converted to Common stock (in shares)   1,000      
Series AA-3 Convertible Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   0      
Original (in shares)   13,000      
Conversion of preferred stock to common stock (in shares) [3]   (13,000)      
Converted to Common stock (in shares)   0      
Series AA-4 Convertible Preferred Stock [Member]          
Preferred Stock, Shares Outstanding (in shares)   500      
Gross Proceeds   $ 1,026,000      
Fees   133,000      
Net Proceeds   $ 893,000      
Price As Adjusted, Conversions (in dollars per share)   $ 74.4      
Series AA-4 Convertible Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   0      
Series AA-4 Convertible Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Conversion Prices (in dollars per share)   $ 371.2      
Shares Purchased/ Issued in Exchange (in shares) [2]   1,026      
Conversions / Exchanges (in shares)   (526)      
Converted to Common stock (in shares)   526      
Series AA-4 Convertible Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   (7,000)      
Original (in shares)   14,000      
Conversion of preferred stock to common stock (in shares) [3]   (7,000)      
Converted to Common stock (in shares)   7,000      
Series AA-5 Convertible Preferred Stock [Member]          
Preferred Stock, Shares Outstanding (in shares)   50      
Gross Proceeds   $ 550,000      
Fees   72,000      
Net Proceeds   $ 478,000      
Price As Adjusted, Conversions (in dollars per share)   $ 84.8      
Series AA-5 Convertible Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   0      
Series AA-5 Convertible Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Conversion Prices (in dollars per share)   $ 424      
Shares Purchased/ Issued in Exchange (in shares) [2]   550      
Conversions / Exchanges (in shares)   (500)      
Converted to Common stock (in shares)   500      
Series AA-5 Convertible Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   0      
Original (in shares)   6,000      
Conversion of preferred stock to common stock (in shares) [3]   (6,000)      
Converted to Common stock (in shares)   0      
Series AAA Convertible Preferred Stock [Member]          
Conversion Prices (in dollars per share) [4],[5],[6],[7]   $ 66.8      
Preferred Stock, Shares Outstanding (in shares)   7,245      
Gross Proceeds   $ 5,377,000      
Fees   645,000      
Net Proceeds   $ 4,732,000      
Series AAA Convertible Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   19,000      
Series AAA Convertible Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Shares Purchased/ Issued in Exchange (in shares) [2]   9,388      
Conversions / Exchanges (in shares)   (2,143)      
Converted to Common stock (in shares)   2,143      
Series AAA Convertible Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   (108,000)      
Original (in shares)   140,000      
Conversion of preferred stock to common stock (in shares) [3]   (32,000)      
Converted to Common stock (in shares)   108,000      
Series AAA-2 Convertible Preferred Stock [Member]          
Conversion Prices (in dollars per share) [4],[5],[6],[7]   $ 68.4      
Preferred Stock, Shares Outstanding (in shares)   3,148      
Gross Proceeds   $ 2,978,000      
Fees   357,000      
Net Proceeds   $ 2,621,000      
Series AAA-2 Convertible Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   11,000      
Series AAA-2 Convertible Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Shares Purchased/ Issued in Exchange (in shares) [2]   5,334      
Conversions / Exchanges (in shares)   (2,186)      
Converted to Common stock (in shares)   2,186      
Series AAA-2 Convertible Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   (46,000)      
Original (in shares)   78,000      
Conversion of preferred stock to common stock (in shares) [3]   (32,000)      
Converted to Common stock (in shares)   46,000      
Series AAA Junior Preferred Stock [Member]          
Conversion Prices (in dollars per share) [4],[5],[6],[7]   $ 50      
Preferred Stock, Shares Outstanding (in shares)   352      
Gross Proceeds   $ 1,210,000      
Fees   145,000      
Net Proceeds   $ 1,065,000      
Series AAA Junior Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   4,000      
Series AAA Junior Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Shares Purchased/ Issued in Exchange (in shares) [2]   1,210      
Conversions / Exchanges (in shares)   (858)      
Converted to Common stock (in shares)   858      
Series AAA Junior Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   (7,000)      
Original (in shares)   24,000      
Conversion of preferred stock to common stock (in shares) [3]   (17,000)      
Converted to Common stock (in shares)   7,000      
Series AAA-2 Junior Convertible Preferred Stock [Member]          
Conversion Prices (in dollars per share) [4],[5],[6],[7]   $ 50      
Preferred Stock, Shares Outstanding (in shares)   441      
Gross Proceeds   $ 551,000      
Fees   66,000      
Net Proceeds   $ 485,000      
Series AAA-2 Junior Convertible Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   2,000      
Series AAA-2 Junior Convertible Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Shares Purchased/ Issued in Exchange (in shares) [2]   551      
Conversions / Exchanges (in shares)   (110)      
Converted to Common stock (in shares)   110      
Series AAA-2 Junior Convertible Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   (9,000)      
Original (in shares)   11,000      
Conversion of preferred stock to common stock (in shares) [3]   (2,000)      
Converted to Common stock (in shares)   9,000      
Series AAA-3 Junior Preferred Stock [Member]          
Conversion Prices (in dollars per share) [4],[5],[6],[7]   $ 50      
Preferred Stock, Shares Outstanding (in shares)   627      
Gross Proceeds   $ 697,000      
Fees   84,000      
Net Proceeds   $ 613,000      
Series AAA-3 Junior Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   2,000      
Series AAA-3 Junior Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Shares Purchased/ Issued in Exchange (in shares) [2]   697      
Conversions / Exchanges (in shares)   (70)      
Converted to Common stock (in shares)   70      
Series AAA-3 Junior Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   (13,000)      
Original (in shares)   14,000      
Conversion of preferred stock to common stock (in shares) [3]   (1,000)      
Converted to Common stock (in shares)   13,000      
Series AAA-4 Junior Preferred Stock [Member]          
Conversion Prices (in dollars per share) [4],[5],[6],[7]   $ 50      
Preferred Stock, Shares Outstanding (in shares)   399      
Gross Proceeds   $ 399,000      
Fees   48,000      
Net Proceeds   $ 351,000      
Series AAA-4 Junior Preferred Stock [Member] | Warrants Issued With Placement Agent Agreement [Member]          
Placement Agent Warrants (in shares) [1]   1,000      
Series AAA-4 Junior Preferred Stock [Member] | Preferred Stock Converted to Preferred Stock [Member]          
Shares Purchased/ Issued in Exchange (in shares) [2]   399      
Conversions / Exchanges (in shares)   0      
Converted to Common stock (in shares)   (0)      
Series AAA-4 Junior Preferred Stock [Member] | Preferred Stock Converted to Common Stock [Member]          
Conversions / Exchanges (in shares)   (8,000)      
Original (in shares)   (8,000)      
Conversion of preferred stock to common stock (in shares) [3]   0      
Converted to Common stock (in shares)   8,000      
[1] Pursuant to the terms of the Placement Agent Agreements, we agreed to issue to the Placement Agent, following the final closing under the individual Preferred Stock Offerings (effective as of the respective individual series closing dates), five-year warrants to purchase 14.5% of the shares of common stock issuable upon conversion of the respective series of Convertible Preferred Stock sold in the respective Preferred Stock Offering, at an exercise price equal to the applicable Preferred Stock Offering conversion price. See below for placement agent warrants exchanged in connection with the Exchange.
[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] As adjusted to reflect reduction in conversion prices as a result of the Series AA Down Round Feature, described below.
[4] In July 2025, as described at Note 8, the conversion prices for the AAA Preferred and the AAA Junior Preferred were adjusted pursuant to the applicable Down Round Feature, described below. The conversion prices for i) AAA, ii) AAA-2, and iii) AAA Junior Preferred stock outstanding were adjusted to $20.08, $20.52, and $15.00, respectively, on the applicable date that the Down Round Feature was triggered.
[5] 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 $104.00 as a result of the Series AA Down Round Feature described below.
[6] 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.
[7] 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 condensed consolidated balance sheet.