Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Common Stock (Tables)

v3.21.2
Note 11 - Common Stock (Tables)
6 Months Ended
Jun. 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%