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Share-based Compensation (Tables)
3 Months Ended
Mar. 31, 2022
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Summary of Non-cash, Share-based Compensation Expense

For the three month periods ended March 31, 2022 and 2021, the Company recognized the following non-cash, share-based compensation expense in the statements of operations (in thousands):

 

 

Three Months

Ended March 31,

 

 

2022

 

 

2021

 

Research and development

$

41

 

 

$

36

 

General and administrative

 

126

 

 

 

105

 

Total

$

167

 

 

$

141

 

Summary of Stock Option Activities

Stock option transactions for the three month period ended March 31, 2022 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, 2021

 

904,123

 

 

$

5.59

 

 

 

9.18

 

Granted

 

 

 

 

 

 

 

 

 

Exercised

 

 

 

 

 

 

 

Forfeited and cancelled

 

(34,663

)

 

 

3.08

 

 

 

 

 

Options outstanding at March 31, 2022

 

869,460

 

 

$

5.69

 

 

 

8.91

 

Options exercisable at March 31, 2022

 

215,387

 

 

$

12.65

 

 

 

8.22

 

Options vested and expected to vest

 

868,256

 

 

$

5.70

 

 

 

8.91