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Accrued Expenses (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Accrued Expenses [Abstract]    
Legal and accounting fees $ 68,000 $ 122,000
Accrued compensation 728,000 789,000
Lease liability 8,000 44,000
Accrued research and development costs and other 6,359,000 3,087,000
Total $ 7,163,000 $ 4,042,000