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:

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​

​

​

​

​

​

​

​

    

​

    

​

​

    

Weighted Average

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​

​

​

​

​

​

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):

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​

​

​

​

​

​

​

​

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:

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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

 

(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:

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​

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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:

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​

​

​

    

​

    

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