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Schedule of Stock-based Compensation Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Total stock-based compensation expense $ 798 $ 351 $ 1,446 $ 1,486
Research and Development Expense [Member]        
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Total stock-based compensation expense 16 261 432 377
General and Administrative Expense [Member]        
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Total stock-based compensation expense $ 782 $ 90 $ 1,014 $ 1,109