Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Goodwill [Roll Forward]
Beginning balance		$ 1,410
Impairment	$ (95)		$ (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