Goodwill (Schedule of changes in the carrying value of goodwill) (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Goodwill [Roll Forward]
Beginning balance	$ 1,410
Impairment		$ (95)
Ending balance	1,410		$ 1,410
RAM
Goodwill [Roll Forward]
Beginning balance	1,410	$ 1,505	1,505
Impairment	0		(95)
Ending balance	1,410		1,410
Accumulated impairment	$ 1,116		$ 1,116