Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Common Stock (Tables)

v3.21.2
Note 11 - Common Stock (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
                   

Number of

 
                   

Shares

 
                   

Outstanding

 
   

Exercisable

 

Expiration

 

Exercise

   

Under

 

Issuance Date

 

for

 

Date

 

Price

   

Warrants

 
                         

February 2015

 

Common Shares

 

February 17, 2025

  $ 4,000.00       79  

March 2015

 

Common Shares

 

March 26, 2025

  $ 2,720.00       2  

May 2015

 

Common Shares

 

May 12, 2025

  $ 4,240.00       37  

December 2015

 

Common Shares

 

December 16, 2025

  $ 5,600.00       31  

April 2016

 

Common Shares

 

April 1, 2026

  $ 6,080.00       25  

June 2016

 

Common Shares

 

June 20, 2026

  $ 4,980.00       101  

May 2017

 

Common Shares

 

May 25, 2027

  $ 9,500.00       223  

November 2019

 

Common Shares

 

November 26, 2024

  $ 18.36       989,379  

November 2019

 

Common Shares

 

November 26, 2024

  $ 2.82       285,632  

April 2020

 

Common Shares

 

April 21, 2025

  $ 2.82       413,210  

January 2021

 

Common Shares

 

January 19, 2026

  $ 3.40       8,104,880  
                      9,793,599  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
   

Immediately

   

Immediately

 

Series B Warrants

 

before

Modification

   

After

Modification

 
                 

Exercise price

  $ 6.10     $ 3.40  

Common stock price

  $ 3.19     $ 3.19  

Expected term (in years)

    3.9       3.9  

Average volatility

    90 %     90 %

Risk-free interest rate

    0.33 %     0.33 %

Dividend yield

    0 %     0 %
   

Immediately

   

Immediately

 

Series A-2 and B-2 Warrants

 

before

Modification

   

After

Modification

 
                 

Exercise price

  $ 6.37     $ 3.40  

Common stock price

  $ 3.19     $ 3.19  

Expected term (in years)

    4.3       4.3  

Average volatility

    90 %     90 %

Risk-free interest rate

    0.33 %     0.33 %

Dividend yield

    0 %     0 %
   

Immediately

   

Immediately

 

Series B, A-2 and B-2 Warrants

 

before

Modification

   

After

Modification

 
                 

Exercise price

  $ 3.40     $ 2.82  

Common stock price

  $ 3.01     $ 3.01  

Expected term (in years)

    3.6       3.6  

Average volatility

    80 %     80 %

Risk-free interest rate

    0.58 %     0.58 %

Dividend yield

    0 %     0 %