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Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Accrued Expense [Abstract]    
Registration penalties $ 1,950 $ 264
License fees 893 336
Board of director's fees 507 320
Legal and professional fees 221 196
Other 823 1,011
Total accrued expenses $ 4,394 $ 2,127