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Accrued and Other Liabilities - Schedule of accrued and other current liabilities (Details) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Accrued and Other Current Liabilities [Abstract]    
Accrued research and development $ 3,611,000 $ 2,310,000
Accrued legal and professional fees 333,000 233,000
Other current liabilities 887,000 634,000
Accrued and other current liabilities 4,831,000 3,177,000
Accrued payroll costs $ 680,000 $ 495,000