Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Tables)

v3.24.1.1.u2
Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of Stock Option Activities

The following table summarizes stock option activities for the three months ended March 31, 2024:

    

    

    

Weighted Average

Remaining

Weighted Average

Contractual Life (in

Stock Options

Exercise Price

years)

Outstanding at December 31, 2023

 

76,112

$

85.95

 

3.31

Outstanding at March 31, 2024

 

76,112

$

85.95

 

3.06

Options vested and exercisable at March 31, 2024

 

47,570

$

85.95

 

3.06

Schedule of Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense for the three months ended March 31, 2024 and 2023 (in thousands):

For the three months ended March 31, 

    

2024

    

2023

    

General and administrative

$

47

$

109

Research and development

 

29

 

126

Total stock-based compensation expense

$

76

$

235

Summary of Warrant Activities

A summary of warrant activities for the three months ended March 31, 2024, is presented below:

    

    

    

Weighted Average

Remaining

Weighted Average

Contractual Life (in

Warrants

Exercise Price

years)

Outstanding as of December 31, 2023

 

4,481,868

$

1.34

 

5.34

Exercised

 

(704,236)

 

 

Outstanding as of March 31, 2024

 

3,777,632

$

1.59

 

5.09

Restricted Stock Awards [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedules of Restricted Stock and Restricted Stock Unit Activity

The following table summarizes restricted stock award activities for the three months ended March 31, 2024:

    

    

Weighted Average

Grant Date Fair

Number of Shares

Value

Nonvested at December 31, 2023

 

64,706

$

11.59

Nonvested at March 31, 2024

 

64,706

$

11.59

Restricted Stock Units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedules of Restricted Stock and Restricted Stock Unit Activity

Certain employees and consultants have been awarded restricted stock units with time-based vesting. The following table summarizes restricted stock units’ activities for the three months ended March 31, 2024:

    

    

Weighted Average

Grant Date Fair

Number of Units

Value

Nonvested at December 31, 2023

 

95,197

$

18.78

Forfeited

(15,505)

13.40

Vested

 

(8,621)

 

22.13

Nonvested at March 31, 2024

 

71,071

$

19.54