Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment (Details)

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Property and Equipment (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Property, Plant and Equipment [Abstract]        
Depreciation expense $ 76 $ 74 $ 199 $ 249