Warrants Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2014
Class of Warrant or Right [Line Items]
Outstanding warrants			95,431
Change in fair value of warrants			$ (692)	$ (196)
Term A Warrants [Member]
Class of Warrant or Right [Line Items]
Preferred stock and warrants issued during the period, shares		53,720
Exercise Price Per Warrant			$ 11.169
Class of warrants, exercised			0
Outstanding warrants			53,720
Change in fair value of warrants			$ 351	(108)
Term B Warrants [Member]
Class of Warrant or Right [Line Items]
Preferred stock and warrants issued during the period, shares	40,292
Exercise Price Per Warrant			$ 11.169
Class of warrants, exercised			0
Outstanding warrants			40,292
Change in fair value of warrants			$ 263	360
2014 Warrants [Member]
Class of Warrant or Right [Line Items]
Preferred stock and warrants issued during the period, shares					19,931
Exercise Price Per Warrant			$ 5.912
Class of warrants, exercised			18,512
Outstanding warrants			1,419
Change in fair value of warrants			$ 78	$ (56)