| NOTE 7 —Warrants There were 155,338 warrants exercised on May 10, 2019 for total cash proceeds of $23.  The following table discloses warrants issued and outstanding as of September 30, 2019 and December 31, 2018:    
|   |   | September 30, 2019 |  
|   |   |   |   |   |   | Number of |   |   |   |  
|   |   | Exercise |   |   | warrant |   |   | Year of |  
| Issuance date |   | price |   |   | shares |   |   | expiration |  
| Common |   |   |   |   |   |   |   |   |   |   |  
| November 2012 |   | $ | 6.00 |   |   |   | 7 |   |   | 2028 |  
| November 2012 |   | $ | 6.00 |   |   |   | 927 |   |   | 2020 |  
| November 2012 |   | $ | 14.50 |   |   |   | 22 |   |   | 2028 |  
| Total warrants |   |   |   |   |   |   | 956 |   |   |   |  
|   |   |   |   |   |   |   |   |   |   |   |  
|   |   | December 31, 2018 |  
|   |   |   |   |   |   | Number of |   |   |   |  
|   |   | Exercise |   |   | warrant |   |   | Year of |  
| Issuance date |   | price |   |   | shares |   |   | expiration |  
| Common |   |   |   |   |   |   |   |   |   |   |  
| November 2012 |   | $ | 6.00 |   |   |   | 7 |   |   | 2028 |  
| November 2012 |   | $ | 6.00 |   |   |   | 927 |   |   | 2020 |  
| November 2012 |   | $ | 14.50 |   |   |   | 22 |   |   | 2028 |  
| August 2016 |   | $ | 0.15 |   |   |   | 155,338 |   |   | 2023 |  
| Total warrants |   |   |   |   |   |   | 156,294 |   |   |   |    |