Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Tables)

v3.23.1
Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2022
Stockholders' Equity  
Summary of restricted stock award activity

Certain employees, directors and consultants have been awarded restricted stock. The restricted stock vesting consists of milestone and time-based vesting. The following table summarizes restricted stock award activity for the year ended December 31, 2022 and 2021:

Weighted Average

Grant Date Fair

    

Number of Shares

    

Value

Nonvested at December 31, 2020

 

386,982

$

36.09

Granted

 

122,900

 

28.61

Forfeited

 

(1,566)

 

22.43

Vested

 

(57,050)

41.02

Nonvested at December 31, 2021

 

451,266

$

33.48

Granted

159,416

20.00

Forfeited

(15,850)

30.19

Vested

 

(215,935)

 

36.63

Non-vested at December 31, 2022

 

378,897

$

26.15

Summary of restricted stock units activity

Certain employees have been awarded restricted stock units. The following table summarizes restricted stock units activity for the year ended December 31, 2022:

    

    

Weighted Average

Number of

Grant Date Fair

Shares

Value

Non-vested at December 31, 2020

 

$

Non-vested at December 31, 2021

 

 

Granted

 

85,000

 

10.50

Non-vested at December 31, 2022

 

85,000

$

10.50

Summary of stock option award activity

The following table summarizes stock option award activity for the year ended December 31, 2022 and 2021:

Weighted Average

Remaining

Weighted Average

Contractual Life

    

Stock Options

    

Exercise Price

    

(in years)

Outstanding as of December 31, 2020

 

22,000

$

32.00

 

8.04

Granted

 

5,000

 

28.50

 

Outstanding as of December 31, 2021

 

27,000

$

31.35

 

7.44

Granted

 

4,000

 

14.20

 

Forfeited

(4,000)

14.20

Outstanding as of December 31, 2022

27,000

$

31.35

6.44

Vested and exercisable as of December 31, 2022

 

15,500

$

23.06

 

6.89

Summary of stock options assumptions used

The Company used the Black-Scholes Model for determining the estimated fair value of stock-based compensation related to stock options. The table below summarizes the assumptions used:

For the Years Ended December 31, 

 

    

2022

    

2021

 

Risk-free interest rate

 

2.85

%

1.04% - 1.50

%

Expected dividend yield

 

Expected term in years

 

10.0

10.0

Expected volatility

 

73.07

%

100.65% - 102.71

%

Summary of warrant activities

A summary of warrant activities for year ended December 31, 2022 and 2021 is presented below:

Weighted Average

Remaining

Weighted Average

Contractual Life

    

Warrants

    

Exercise Price

    

(in years)

Outstanding as of December 31, 2020

 

5,751

$

53.80

 

1.22

Exercised

 

(70)

 

 

Expired

 

(4,432)

 

70.00

 

Outstanding as of December 31, 2021

 

1,249

$

 

3.83

Granted

4,356,361

3.37

Fractional share adjustment

(13)

Outstanding as of December 31, 2022

4,357,597

$

3.37

3.26

Summary of stock-based compensation expense

The following table summarizes stock-based compensation expense for the years ended December 31, 2022 and 2021 (in thousands).

For the year ended December 31, 

    

2022

    

2021

Research and development

$

888

$

684

General and administrative

 

2,036

 

2,453

Total stock-based compensation expense

$

2,924

$

3,137