Restatement of Previously Issued 2017 Consolidated Information, Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017
Net Cash Provided by (Used in) Operating Activities [Abstract]
Other accrued liabilities			$ (16)			$ 74	$ (3)	$ 167	$ (754)	$ 255	$ 1,006	$ 602
Change in fair value of embedded conversion feature			0	$ 1,993	$ 2,903	(1,738)	0	1,165	0	3,158	0	3,158
Change in fair value of warrants liability	$ 1,053	$ 263	(40)	(421)	(657)	671	222	14	1,275	(407)	0	(595)
Loss on extinguishment of debentures				20,160	0	0		0		20,160	0	20,160
Amortization of debt discount			19			247	39	764	44	928	50	944
Impairment for intangibles			0			0	0	0	0	23	0	23
Net loss	$ (1,582)	$ (1,868)	(2,042)	$ (19,077)	$ 2,459	(3,974)	(3,910)	(1,515)	(5,492)	(20,592)	$ (4,033)	(21,514)
Effect of Adoption Higher / (Lower) [Member]
Net Cash Provided by (Used in) Operating Activities [Abstract]
Other accrued liabilities						135		282		417		304
Deferred revenue												(415)
Change in fair value of embedded conversion feature						1,738		(1,165)		(3,158)		3,158
Change in fair value of warrants liability			40			539	200	10	1,174	330		493
Loss on extinguishment of debentures										(8,361)		(8,361)
Amortization of debt discount						(476)		(854)		(1,416)		(1,416)
Impairment for intangibles												(500)
Net loss			$ (181)			$ (1,739)	$ (332)	$ (1,925)	$ (1,624)	$ (3,481)		$ (2,683)