Liquidity and Going Concern - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash	$ 987				$ 987		$ 2,007
Working capital	2,022				2,022
Net loss	$ 875	$ 598	$ 1,689	$ 1,285	1,473	$ 2,974
Net cash used in operating activities					$ 968	$ 689