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Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2022
Schedule of Assumptions Used to Determine the Fair Value of Option Grants

The assumptions that the Company used to determine the fair value of options granted were as follows, presented on a weighted average basis:

 

 

Year Ended December 31,

 

 

2022

 

 

2021

 

Risk-free interest rate

 

2.5

%

 

 

0.9

%

Expected term (in years)

 

5.9

 

 

 

6.0

 

Expected volatility

 

81.2

%

 

 

80.5

%

Expected dividend yield

 

0

%

 

 

0

%

 

Table of Contents
Schedule of Common Stock Option Activity

The following table summarizes the Company’s option activity since December 31, 2021:

 

 

 

 

 

 

 

 

 

Weighted

 

 

 

 

 

 

 

 

 

Weighted

 

 

Average

 

 

 

 

 

 

 

 

 

Average

 

 

Remaining

 

 

Aggregate

 

 

 

Number

 

 

Exercise

 

 

Contractual

 

 

Intrinsic

 

 

 

of Shares

 

 

Price

 

 

Term

 

 

Value

 

 

 

 

 

 

 

 

 

(in years)

 

 

(in thousands)

 

Outstanding as of December 31, 2021

 

 

6,248,675

 

 

$

9.15

 

 

 

8.2

 

 

$

 

Granted

 

 

4,509,673

 

 

$

2.13

 

 

 

 

 

 

 

Exercised

 

 

 

 

$

 

 

 

 

 

 

 

Forfeited

 

 

(2,282,532

)

 

$

7.31

 

 

 

 

 

 

 

Outstanding as of December 31, 2022

 

 

8,475,816

 

 

$

5.91

 

 

 

8.2

 

 

$

 

Options vested and expected to vest as of
       December 31, 2022

 

 

8,475,816

 

 

$

5.91

 

 

 

8.2

 

 

$

 

Options exercisable as of December 31, 2022

 

 

3,641,107

 

 

$

8.27

 

 

 

7.1

 

 

$

 

Schedule of Stock Based Compensation Expense

Stock-based compensation expense was classified in the consolidated statements of operations and comprehensive loss as follows (in thousands):

 

 

 

Year Ended December 31,

 

 

 

2022

 

 

2021

 

Research and development expenses

 

$

1,877

 

 

$

3,836

 

General and administrative expenses

 

 

5,144

 

 

 

6,472

 

 

 

$

7,021

 

 

$

10,308

 

Restricted Stock Units (RSUs) [Member]  
Schedule of Activity Relating to Restricted Stock Units

The table below summarizes the Company’s restricted stock unit activity since December 31, 2021:

 

 

 

 

 

 

Weighted

 

 

 

 

 

 

Average

 

 

 

Number

 

 

Grant Date

 

 

 

of Shares

 

 

Fair Value

 

Outstanding as of December 31, 2021

 

 

289,918

 

 

$

7.79

 

Granted

 

 

185,871

 

 

$

1.90

 

Vested

 

 

(76,539

)

 

$

6.46

 

Forfeited

 

 

(142,006

)

 

$

6.97

 

Outstanding as of December 31, 2022

 

 

257,244

 

 

$

4.38

 

Performance Restricted Stock Units [Member]  
Schedule of Activity Relating to Restricted Stock Units

The table below summarizes the Company’s performance restricted stock unit activity since December 31, 2021:

 

 

 

 

 

 

Weighted

 

 

 

 

 

 

Average

 

 

 

Number

 

 

Grant Date

 

 

 

of Shares

 

 

Fair Value

 

Outstanding as of December 31, 2021

 

 

190,000

 

 

$

9.91

 

Granted

 

 

 

 

$

 

Vested

 

 

 

 

$

 

Forfeited

 

 

(20,000

)

 

$

7.51

 

Outstanding as of December 31, 2022

 

 

170,000

 

 

$

10.19