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Organization of the Company and Basis of Presentation (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Organization of the Company and Basis of Presentation [Abstract]    
Net loss $ (7,830) $ (7,288)
Accumulated deficit (357,627) (349,797)
Cash and cash equivalents $ 11,885 $ 17,504