Annual report pursuant to Section 13 and 15(d)

Property and Equipment Narrative (Details)

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Property and Equipment Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]      
Depreciation $ 314 $ 438 $ 900