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Share-based Compensation (Tables)
9 Months Ended
Sep. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Summary of Non-cash, Share-based Compensation Expense

For the three and nine month periods ended September 30, 2021 and 2020, the Company recognized the following non-cash, share-based compensation expense in the statements of operations (in thousands):

 

 

Three Months Ended

September 30,

 

 

Nine Months Ended

September 30,

 

 

2021

 

 

2020

 

 

2021

 

 

2020

 

Research and development

$

41

 

 

$

5

 

 

$

115

 

 

$

18

 

General and administrative

 

63

 

 

 

 

 

 

263

 

 

 

7

 

Total

$

104

 

 

$

5

 

 

$

378

 

 

$

25

 

Summary of Stock Option Activities

Stock option transactions for the nine month period ended September 30, 2021 under the Company’s stock incentive plans were as follows:

 

 

Number

of Options

 

 

Weighted Average Exercise Price

 

 

Weighted

Average

Remaining

Contractual

Term

(in years)

 

Options outstanding at December 31, 2020

 

531,238

 

 

$

8.71

 

 

 

9.68

 

Granted

 

170,200

 

 

 

3.51

 

 

 

 

 

Exercised

 

 

 

 

 

 

 

Forfeited and cancelled

 

(60,815

)

 

 

12.71

 

 

 

 

 

Options outstanding at September 30, 2021

 

640,623

 

 

$

6.95

 

 

 

9.11

 

Options exercisable at September 30, 2021

 

125,951

 

 

$

18.98

 

 

 

8.26

 

Options vested and expected to vest

 

639,557

 

 

$

6.95

 

 

 

9.11