Organization, Nature of Operations and Basis of Presentation (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions			1 Months Ended	9 Months Ended	12 Months Ended
	Jan. 01, 2019	Aug. 10, 2018	Oct. 31, 2018	Sep. 30, 2019	Dec. 31, 2018	Nov. 30, 2019	Sep. 30, 2018	Dec. 31, 2017
Organization, Nature of Operations and Basis of Presentation
Cash and cash equivalents				$ 18,650	$ 28,918		$ 9,549	$ 17,116
Net proceeds from sale of securities			$ 16,700
Net proceeds from sale of common stock					$ 12,200
Common stock, par value (in dollars per share)				$ 0.001	$ 0.001
Cash						$ 17,600
Reverse stock spilt		128.5		3.7
Lessee, Operating Lease, Term of Contract				12 months
Lease, Practical Expedients, Package [true false]	true
Right of Use Asset	$ 537			$ 451	$ 0
Operating Lease Liability	$ 939			$ 241	$ 0