v3.26.1
Note 7 - Stockholders' Equity (Tables)
6 Months Ended
Jun. 30, 2026
Notes Tables  
Schedule of Stock by Class [Table Text Block]
              

Original

  

Shares

          

Shares

  

Conversion

  

Shares

 
  

Shares

  

Gross

  

Net

  

Conversion

  

Outstanding

  

Series F

  

Series F

  

Outstanding

  

Price at

  

Issuable at

 

Date of Purchase

 

Purchased

  

Proceeds

  

Proceeds

  

Price

  

December 31, 2025

  

Issued

  

Converted

  

June 30, 2026

  

June 30, 2026

  

June 30, 2026

 

November 15, 2023

  1,850  $1,850,000  $1,850,000  $124.70   150         150  $0.83   180,854 

March 6, 2024

  1,000   1,000,000   950,000   60.29   100         100   0.83   120,569 

May 31, 2024

  1,050   1,050,000   1,025,000   32.15   135         135   0.83   162,768 

July 18, 2025

  1,000   1,000,000   1,000,000   1.40   422      (422)     0.85    

July 21, 2025

  500   500,000   500,000   1.40   500      (500)     0.85    

July 24, 2025

  1,000   1,000,000   1,000,000   2.19   1,000      (1,000)     0.85    

October 6, 2025

  1,000   1,000,000   1,000,000   2.34   815      (815)     0.85    

November 24, 2025

  500   500,000   500,000   1.13   500      (500)     0.85    

December 22, 2025

  500   500,000   500,000   0.96   500         500  0.85(i)   586,441 

January 2, 2026

  500   500,000   500,000   0.85      500      500  0.85(i)   586,441 

May 27, 2026

  500   500,000   500,000   0.97      500      500  0.97(ii)   513,031 

Total June 30, 2026

  9,400  $9,400,000  $9,325,000  $   4,122   1,000   (3,237)  1,885  $   2,150,105 
                                         

(i) - Reflects the conversion price after the January 2026 Down Round Trigger that was triggered with the Sale of Series F on January 2, 2026.

 

(ii) - This issuance triggered a down round provision embedded within the Series G PS outstanding.

 
              

Original

  

Shares

          

Shares

  

Conversion

  

Shares

 
  

Shares

  

Gross

  

Net

  

Conversion

  

Outstanding

  

Series F

  

Series F

  

Outstanding

  

Price at

  

Issuable at

 

Date of Purchase

 

Purchased

  

Proceeds

  

Proceeds

  

Price

  

December 31, 2024

  

Issued

  

Converted

  

June 30, 2025

  

June 30, 2025

  

June 30, 2025

 

November 15, 2023

  1,850  $1,850,000  $1,850,000  $124.70   150         150  $0.83

(ii)

  180,854 

March 6, 2024

  1,000   1,000,000   950,000   60.29   435      (335)  100   0.83

(ii)

  120,569 

April 12, 2024

  1,050   1,050,000   1,050,000   37.00   1,050      (1,050)     0.83    

May 31, 2024

  1,050   1,050,000   1,025,000   32.15   1,050      (525)  525   0.83

(ii)

  632,998 

July 25, 2024

  500   500,000   500,000   23.15   500      (500)     0.83    

August 27, 2024

  500   500,000   500,000   20.19   500      (500)     0.83    

October 1, 2024

  1,500         12.00   1,500      (1,500)     0.83    

December 18, 2024

  750   750,000   750,000   5.25   750      (750)     0.83    

February 7, 2025

  1,000   1,000,000   1,000,000   2.22      1,000   (1,000)     0.83    

March 17, 2025

  500   500,000   500,000   1.20      500   (500)     0.83    

May 5, 2025

  500   500,000   500,000   0.83      500   (500)     0.83    

June 6, 2025

  500   500,000   500,000   1.19      500      500   1.19   418,631 

June 9, 2025

  1,000   1,000,000   1,000,000   1.19      1,000   (600)  400   1.19   335,345 

June 17, 2025

  1,000   1,000,000   1,000,000   1.25      1,000      1,000   1.25   797,067 

Total June 30, 2025

  12,700  $11,200,000  $11,125,000  $   5,935   4,500   (7,760)  2,675  $   2,485,464 
                                         

(ii) Reflects the conversion price after the May 2025 Down Round Trigger that was triggered with the Sale of Series F and Series F warrants on May 5, 2025.

 
                                         
              

Original

  

Shares

          

Shares

  

Conversion

  

Shares

 
  

Shares

  

Gross

  

Net

  

Conversion

  

Outstanding

  

Series G

  

Series G

  

Outstanding

  

Price at

  

Issuable at

 

Date of Purchase

 

Purchased

  

Proceeds

  

Proceeds

  

Price

  

December 31, 2025

  

Issued

  

Converted

  

June 30, 2026

  

June 30, 2026

  

June 30, 2026

 

November 10, 2025

  12,000  $12,000,000  $12,000,000  $1.2300   6,190      (6,190)    $0.96    

March 4, 2026

  250   250,000   250,000   1.0000      250   (250)     1.00    

March 5, 2026

  2,000   2,000,000   2,000,000   1.0000      2,000   (2,000)     1.00    

May 14, 2026

  2,000   2,000,000   2,000,000   1.0000      2,000   (2,000)    

0.97

(i)   

May 28, 2026

  1,000   1,000,000   1,000,000   1.0000      1,000   (1,000)     1.00    

May 28, 2026

  2,000   2,000,000   2,000,000   1.0000      2,000      2,000   1.00   2,000,000 

Total June 30, 2026

  19,250  $19,250,000  $19,250,000  $   6,190   7,250   (11,440)  2,000  $   2,000,000 
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
  

June 30, 2026

  

December 31, 2025

 

Exercise price

 $  $ 

Stock price

 $0.8913  $0.8138 

Expected term (years)

  3.25   3.75 

Volatility

  150.58%  140.18%

Risk-free rate

  4.15%  3.64%

Dividend yield

  0.00%  0.00%

Probability of capital raise below exercise price

  100.00%  100.00%
Schedule of Dividends Payable [Table Text Block]

Deemed Dividend on Series F and G Preferred Stock

 
  

Description of

 

Series F and G Shares

  

Conversion Price

  

Conversion Price

  

Incremental Value

 

Date of Trigger Event

 

Trigger Event

 

Triggered

  

Prior to Trigger

  

After Trigger

  

Deemed Dividend

 

January 2, 2026

 

January 2026 Down Round Trigger

  10,324,493  $0.9615  $0.8526  $1,291,691 

May 27, 2026

 

May 2026 Down Round Trigger

  2,000,000  $1.0000  $0.9746   39,276 
  

Deemed Dividends on Series F and G Preferred Stock

             $1,330,967 
                   

Deemed Dividend on Series F Warrants

 

January 2, 2026

 

January 2026 Down Round Trigger

  4,752,651  $0.9615  $0.8526   57,792 
  

Deemed Dividends on Series F Warrants

             $57,792 
                   
  

Total Deemed Dividends Series F and G Preferred Stock and Series F Warrants

             $1,388,759 

Deemed Dividends on Series F Preferred Stock

 
 

Description of

 

Series F

  

Conversion Prices

  

Conversion Price

  

Incremental Value

 

Date of Trigger Event

Trigger Event

 

Triggered

  

Prior to Trigger

  

After Trigger

  

Deemed Dividend

 

March 17, 2025

March 2025 Down Round Trigger

  5,025  $2.22 - 5.25  $1.20  $976,637 

May 5, 2025

May 2025 Down Round Trigger

  1,045,402  $1.10  $0.83   1,105,871 
 

Deemed Dividends on Series F Preferred Stock

             $2,082,508 
                  

Deemed Dividends on Series F Warrants (see Note 8)

 

March 17, 2025

March 2025 Down Round Trigger

  593,247  $2.22 - 5.25  $1.2000  $79,695 

May 5, 2025

May 2025 Down Round Trigger

  593,247  $1.10  $0.83   36,504 
 

Deemed Dividends on Series F Warrants

             $116,199 
                  

Deemed Dividends on Series B Warrants

 

May 5, 2025

May 2025 Down Round Trigger

  6,777,101  $1.94  $0.83  $2,426,968 
 

Deemed Dividends on Series B Warrants

             $2,426,968 
                  
 

Total Deemed Dividends Series F PS , Series B and F Warrants

             $4,625,675 
                  
                  
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
      

Weighted Average

 
      

Grant Date

 
  

Shares

  

Fair Value

 

Outstanding as of December 31, 2025

  52,040  $34.26 

Granted

  871,928   0.95 

Cancelled

  (83,874)  21.12 

Vested and released

  (36,244)  1.15 

Outstanding as of June 30, 2026

  803,850   0.99 

Vested as of June 30, 2026

  14,637   3.02 

Unvested as of June 30, 2026

  789,213  $0.95 
      

Weighted Average

 
      

Grant Date

 
  

Shares

  

Fair Value

 

Outstanding as of December 31, 2024

  7,293  $324.64 

Granted

  142,730   1.54 

Cancelled

  (1,158)  284.01 

Vested and released

  (78,825)  5.07 

Outstanding as of June 30, 2025

  70,040   26.58 

Vested as of June 30, 2025

  1,243   1,363.11 

Unvested as of June 30, 2025

  68,797  $2.43 
Equity-Linked Instruments [Member]  
Notes Tables  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
  

For the Six Months Ended

 
  

June 30,

 
  

2026

  

2025

 

Expected term (years)

  0.08 - 2.75   2.00 - 3.00 

Volatility

  53.69 - 158.40%  140.71 - 162.94%

Risk-free rate

  3.51 - 3.72%  3.83 - 4.06%

Dividend yield

  0.00%  0.00%