Leases (Schedule of Other Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 266	$ 251	$ 797	$ 751
Financing cash flows from finance leases	5	5	15	8
Right-of-use assets obtained in exchange for new finance lease liabilities				$ 50
Right-of-use assets obtained in exchange for new operating lease liabilities
Finance lease right-of-use assets	28		28		$ 40
Operating lease right - of - use assets	3,166		3,166		3,729
Finance lease liability, current	17		17		16
Finance lease liability, non-current	11		11		24
Operating lease liabilities, current	826		826		775
Operating lease liabilities, non-current	$ 2,441		$ 2,441		$ 3,067
Weighted average remaining lease terms - finance leases	1 year 6 months 29 days		1 year 6 months 29 days		2 years 3 months 29 days
Weighted average remaining lease terms - operating leases	3 years 8 months 1 day		3 years 8 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%