Organization, Nature of Operations and Basis of Presentation (Details) - USD ($) $ in Thousands, shares in Millions			6 Months Ended	12 Months Ended
	Oct. 15, 2018	Aug. 10, 2018	Jun. 30, 2019	Dec. 31, 2018	Aug. 31, 2019	Jan. 01, 2019	Jun. 30, 2018	Dec. 31, 2017
Organization, Nature of Operations and Basis of Presentation
Cash and cash equivalents			$ 21,712	$ 28,918	$ 20,100		$ 7,129	$ 17,116
Net proceeds from sale of securities	$ 16,700
Net proceeds from sale of common stock				12,200
Reverse stock spilt		128.5	3.7
Lessee, Operating Lease, Term of Contract			12 months
Right of Use Asset			$ 481	0		$ 537
Operating Lease Liability			$ 233	$ 0		$ 939