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Stockholders' Equity And Stock-Based Compensation Expense (Tables)
3 Months Ended
Mar. 31, 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

Options exercised

(19,017)

Options forfeited/canceled

Outstanding as of March 31, 2023

2,510,431 

7,142 

Stock-Based Compensation Expense

Three months ended

March 31,

2023

2022

Research and development

$

389 

$

422 

General and administrative

284 

73 

Total stock-based compensation expense

$

673 

$

495