Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation, Share-Based Compensation Expense (Details)

v3.22.1
Stock-based Compensation, Share-Based Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Stock-based Compensation Expense [Abstract]    
Stock based compensation $ 445 $ 494
General and Administrative [Member]    
Stock-based Compensation Expense [Abstract]    
Stock based compensation 295 193
Research and Development [Member]    
Stock-based Compensation Expense [Abstract]    
Stock based compensation $ 150 $ 301