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Stockholders' Equity And Stock-Based Compensation Expense (Tables)
6 Months Ended
Jun. 30, 2023
Stockholders’ Equity And Stock-Based Compensation Expense [Abstract]  
Stock Options And Unvested Performance Award Outstanding Activity

Stock Options

Performance Awards

Outstanding as of December 31, 2022

2,529,448 

7,142 

Options granted

122,000

Options exercised

(281,175)

Options forfeited/canceled

(7,142)

Outstanding as of June 30, 2023

2,363,131

7,142 

Stock-Based Compensation Expense

Three months ended

Six months ended

June 30,

June 30,

2023

2022

2023

2022

Research and development

$

392 

$

413 

$

781 

$

835 

General and administrative

443 

72 

727 

145 

Total stock-based compensation expense

$

835 

$

485 

$

1,508 

$

980