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Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Payables And Accruals [Abstract]    
Employees benefits $ 457 $ 496
Professional services 107 292
Legal fees 144 133
Royalty fees 3 12
Severance 139 347
Other 23 57
Total $ 873 $ 1,337