Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Stockholders' Equity (Tables)

v3.24.2.u1
Note 7 - Stockholders' Equity (Tables)
6 Months Ended
Jun. 30, 2024
Notes Tables  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
   

June 30,

   

December 31,

 
   

2024

   

2023

 

Stock price

  $ 3.50     $ 12.00  

Risk-free interest rate

    4.52 %     3.84 %

Expected dividend yield

           

Expected term in years

    3.3       3.8  

Expected volatility

    160 %     148 %
Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block]
   

Number of

   

Weighted

 
   

Units and

   

Average Grant

 
   

Awards

   

Date Fair Value

 
   

(in thousands)

         

Unvested balance at December 31, 2023

    1,311     $ 196.21  

Granted

           

Forfeited

           

Vested

    (283 )     85.50  

Unvested balance at March 31, 2024

    1,028     $ 226.69  

Unvested balance at June 30, 2024

    1,028     $ 226.69  
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
                   

Weighted

         
                   

Average

         
   

Number

   

Weighted

   

Remaining

   

Aggregate

 
   

of Options

   

Average

   

Contractual

   

Intrinsic Value

 
   

(in thousands)

   

Exercise Price

   

Term (years)

   

(in thousands)

 

Outstanding at December 31, 2023

    22,474     $ 85.50       9.5     $  

Granted

        $             $  

Exercised

        $             $  

Cancelled/forfeited

        $             $  

Expired

        $             $  

Outstanding at Balance at June 30, 2024

    22,474     $ 85.50       9.0     $  

Expected to vest

    16,304     $ 85.50       9.0     $  

Exercisable

    6,170     $ 85.50       9.0     $  
Share-Based Payment Arrangement, Cost by Plan [Table Text Block]
   

For the three months ended

   

For the six months ended

 
   

June 30,

   

June 30,

   

June 30,

   

June 30,

 
   

2024

   

2023

   

2024

   

2023

 

Research and development

  $ 45     $ 6     $ 90     $ 6  

General and administrative

    147       21       293       32  

Total stock-based compensation expense

  $ 192     $ 27     $ 383     $ 38  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
           

Weighted

         
           

Average

   

Aggregate

 
           

Exercise

   

Intrinsic Value

 
   

Warrants

   

Price

   

(in thousands)

 

Outstanding, December 31, 2023

    524,601     $ 32.42     $  

Granted

    441,076       6.20          

Exercised

    (220,538 )     22.55          

Outstanding, March 31, 2024

    745,139     $ 29.50     $  

Granted

    1,420,741       6.25          

Exercised

    (689,680 )     6.20          

Outstanding, June 30, 2024

    1,476,200     $ 8.64     $  
Warrant [Member]  
Notes Tables  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
   

January 2023

   

New Series A

   

New Series B

 
   

Warrants

   

Warrants

   

Warrants

 

Stock price

  $ 14.25     $ 14.25     $ 14.25  

Risk-free interest rate

    4.40 %     4.02 %     4.40 %

Expected dividend yield

                 

Expected term in years

    2.1       5.0       1.5  

Expected volatility

    185 %     138 %     187 %
   

October 2022

   

Series C

   

Series D

   

Placement Agent

 
   

Warrants

   

Warrants

   

Warrants

   

Warrants

 

Stock price

  $ 4.76     $ 4.76     $ 4.76     $ 4.76  

Risk-free interest rate

    5 %     4.64 %     4.96 %     4.64 %

Expected dividend yield

                       

Expected term in years

    3.4       5.0       1.5       5.0  

Expected volatility

    160 %     141 %     132 %     141 %