Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Tables)

v3.24.3
Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 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 nine months ended September 30, 2024:

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​

​

​

​

​

​

​

​

​

    

​

    

​

​

    

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 September 30, 2024

 

76,112

​

$

85.95

 

2.56

Options vested and exercisable at September 30, 2024

 

47,570

​

$

85.95

 

2.56

Schedule of Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense for the three and nine months ended September 30, 2024 and 2023 (in thousands):

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​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

For the three months ended September 30, 

​

For the nine months ended September 30, 

​

​

    

2024

    

2023

    

2024

    

2023

    

General and administrative

​

$

52

​

$

119

​

$

150

​

$

381

​

Research and development

​

 

(10)

​

 

(19)

​

 

(650)

​

 

(1)

​

Total stock-based compensation expense

​

$

42

​

$

100

​

$

(500)

​

$

380

​

​

Summary of Warrant Activities

A summary of warrant activities for the nine months ended September 30, 2024, is presented below:

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​

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​

    

​

​

    

Weighted Average

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​

​

​

​

​

​

Remaining

​

​

​

​

Weighted Average

​

Contractual Life (in

​

​

Warrants

​

Exercise Price

​

years)

Outstanding as of December 31, 2023

 

4,481,868

​

$

1.34

 

5.34

Exercised

 

(20,490,874)

​

 

—

 

—

Granted

 

76,966,010

​

 

0.19

 

2.50

Outstanding as of September 30, 2024

 

60,957,004

​

$

0.29

 

2.73

Restricted stock award  
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 nine months ended September 30, 2024:

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​

​

    

​

    

Weighted Average

​

​

​

​

Grant Date Fair

​

​

Number of Shares

​

Value

Nonvested at December 31, 2023

 

64,706

​

$

11.59

Vested

​

(4,595)

​

​

54.45

Nonvested at September 30, 2024

 

60,111

​

$

8.32

Restricted stock units  
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 nine months ended September 30, 2024:

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​

​

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​

​

​

    

​

    

Weighted Average

​

​

​

​

Grant Date Fair

​

​

Number of Units

​

Value

Nonvested at December 31, 2023

 

95,197

​

$

18.78

Forfeited

​

(64,892)

​

​

18.19

Vested

 

(18,926)

​

 

23.26

Nonvested at September 30, 2024

 

11,379

​

$

14.69