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Accrued and Other Liabilities - Schedule of accrued and other current liabilities (Details) - USD ($)
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Sep. 30, 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 1,006,000       753,000  
Accrued and other current liabilities 4,950,000 $ 3,489,000 $ 2,940,000 $ 3,473,000 3,296,000 $ 2,140,000
Accrued payroll costs $ 680,000       $ 495,000