Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Concentration Risk [Line Items]
Operating lease costs			$ 41	$ 41
Weighted-average lease term of right-of-use assets			2 years
Right of use assets weighted-average discount rate	3.35%		3.35%
Accounting Standards Update 2016-02
Concentration Risk [Line Items]
Operating lease costs	$ 20	$ 20