Leases (Schedule of Other Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 266	$ 251	$ 531	$ 501
Financing cash flows from finance leases	5	2	10	2
Right-of-use assets obtained in exchange for new finance lease liabilities		50		$ 550
Right-of-use assets obtained in exchange for new operating lease liabilities
Finance lease right-of-use assets	32		32		$ 40
Operating lease right - of - use assets	3,358		3,358		3,729
Finance lease liability, current	18		18		16
Finance lease liability, non-current	16		16		24
Operating lease liabilities, current	809		809		775
Operating lease liabilities, non-current	$ 2,654		$ 2,654		$ 3,067
Weighted average remaining lease terms - finance leases	1 year 9 months 29 days		1 year 9 months 29 days		2 years 3 months 29 days
Weighted average remaining lease terms - operating leases	3 years 11 months 1 day		3 years 11 months 1 day		4 years 5 months 1 day
Weighted average discount rate - finance leases	10.91%		10.91%		10.91%
Weighted average discount rate - operating leases	8.48%		8.48%		8.48%