Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Concentration Risk [Line Items]
Operating lease costs			$ 60	$ 60
Weighted-average lease term of right-of-use assets			3 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