Restatement of Previously Issued 2017 Consolidated Information, Statement of Income and Other Comprehensive Loss (Details) - USD ($) $ / shares in Units, $ 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
Statement of Operations and Other Comprehensive Loss [Abstract]
Revenues, net	$ 7,729	$ 7,388	$ 6,738	$ 7,456	$ 8,445	$ 7,269	$ 14,126	$ 15,714	$ 21,856	$ 23,169	$ 29,855	$ 31,763
Cost of revenues	3,099	3,549	3,345	3,276	3,173	2,733	6,893	5,906	9,992	9,182	12,735	12,998
Gross profit	4,630	3,839	3,393	4,180	5,272	4,536	7,233	9,808	11,864	13,987	17,120	18,765
General and administrative	2,289	2,411	1,884	1,789	1,840	1,711	4,295	3,551	6,583	5,340	8,786	7,604
Loss from operations	(370)	(1,219)	(1,700)	(512)	163	(625)	(2,918)	(462)	(3,287)	(974)	(3,355)	(1,799)
Other (expenses) income, net	(1,292)	(609)	(302)	(18,527)	2,369	(3,279)	(912)	(910)	(2,205)	(19,437)	(942)	(19,586)
Income (loss) before income taxes	(1,662)	(1,828)	(2,002)	(19,039)	2,532	(3,904)	(3,830)	(1,372)	(5,492)	(20,411)	(4,297)	(21,385)
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)
Loss per common share (in dollars per share)												$ (3.26)
Loss attributable to common shares	$ (1,404)	$ (1,099)	$ (504)	$ (11,492)	2,459	(3,974)	$ (1,728)	(1,515)	$ (3,542)	$ (16,650)	$ (2,909)	$ (8,851)
Common shares used in computing loss per share (in shares)												2,713,782
Loss preferred per share (in dollars per share)	$ (17.73)	$ (29.77)	$ (42.69)	$ (1,723.84)			$ (70.63)		$ (81.70)	$ (2,658.44)	$ (55.20)	$ (1,212.47)
Loss attributable to preferred stock	$ (178)	$ (769)	$ (1,537)	$ (7,585)			$ (2,182)		$ (1,950)	$ (3,942)	$ (1,124)	$ (12,663)
Preferred shares used in computing loss per share (In shares)	10,049	25,847	36,002	4,400			30,897		23,872	1,483	20,368	10,444
Series C Convertible Preferred Stock [Member]
Statement of Operations and Other Comprehensive Loss [Abstract]
Net loss											$ (1,124)	$ (12,663)
Loss per common share (in dollars per share)											$ (55.20)	$ (1,212.47)
Common shares used in computing loss per share (in shares)											20,368	10,444
Previously Reported [Member]
Statement of Operations and Other Comprehensive Loss [Abstract]
Revenues, net	$ 7,892	$ 7,533	$ 6,466	$ 7,285	8,471	7,097	$ 13,999	15,568	$ 21,892	$ 22,852		$ 31,449
Cost of revenues	3,049	3,499	3,295	3,276	3,173	2,733	6,793	5,906	9,842	9,182		13,498
Gross profit	4,843	4,034	3,171	4,009	5,298	4,364	7,206	9,662	12,050	13,670		17,951
General and administrative	2,184	2,333	1,803	1,678	1,720	1,601	4,136	3,321	6,319	4,999		7,401
Loss from operations	(52)	(946)	(1,841)	(572)	309	(687)	(2,786)	(378)	(2,837)	(950)		(2,410)
Other (expenses) income, net	(318)	(369)	(342)	(13,061)	(1,441)	(1,478)	(712)	(2,919)	(1,031)	(15,980)		(16,292)
Income (loss) before income taxes	(370)	(1,315)	(2,183)	(13,633)	(1,132)	(2,165)	(3,498)	(3,297)	(3,868)	(16,930)		(18,702)
Net loss	(290)	(1,355)	(2,223)	(13,671)	(1,205)	(2,235)	(3,578)	(3,440)	(3,868)	(17,111)		$ (18,831)
Loss per common share (in dollars per share)												$ (2.85)
Loss attributable to common shares	$ (257)	$ (797)	$ (547)	$ (8,235)	(1,205)	(2,235)	$ (1,580)	(3,440)	$ (2,493)	$ (13,835)		$ (7,747)
Common shares used in computing loss per share (in shares)												2,713,782
Loss preferred per share (in dollars per share)	$ (3.23)	$ (21.60)	$ (46.54)	$ (1,235.43)			$ (64.69)		$ (57.58)	$ (2,208.96)		$ (1,061.25)
Loss attributable to preferred stock	$ (33)	$ (558)	$ (1,676)	$ (5,436)			$ (1,998)		$ (1,375)	$ (3,276)		$ (11,084)
Preferred shares used in computing loss per share (In shares)	10,049	25,847	36,002	4,400			30,897		23,872	1,483		10,444
Sales and Use Tax [Member]
Statement of Operations and Other Comprehensive Loss [Abstract]
Revenues, net	$ 0	$ 0	$ 0	$ 0	0	0	$ 0	0	$ 0	$ 0		$ 0
Cost of revenues							0		0			0
Gross profit	0	0	0	0	0	0	0	0	0	0
General and administrative	128	99	104	135	147	135	203	282	331	417		304
Loss from operations	(128)	(99)	(104)	(135)	(147)	(135)	(203)	(282)	(331)	(417)		(304)
Other (expenses) income, net	0	0	0	0	0	0	0	0	0	0		0
Income (loss) before income taxes	(128)	(99)	(104)	(135)	(147)	(135)	(203)	(282)	(331)	(417)		(304)
Net loss	(128)	(99)	(104)	(135)	(147)	(135)	(203)	(282)	(331)	(417)		$ (304)
Loss per common share (in dollars per share)												$ 0
Loss attributable to common shares												$ 0
Common shares used in computing loss per share (in shares)												0
Loss preferred per share (in dollars per share)												$ 0
Loss attributable to preferred stock												$ 0
Preferred shares used in computing loss per share (In shares)												0
Warrants [Member]
Statement of Operations and Other Comprehensive Loss [Abstract]
Revenues, net	0	0	0	0	0	0	0	0	0	0		$ 0
Cost of revenues							0		0			0
Gross profit	0	0	0	0	0	0	0	0	0	0
General and administrative							0		0	0		0
Loss from operations		0	0		0	0	0	0	0	0
Other (expenses) income, net	(974)	(240)	40	340	529	(539)	(200)	(10)	(1,174)	330		493
Income (loss) before income taxes	(974)	(240)	40	340	529	(539)	(200)	(10)	(1,174)	330		493
Net loss	(974)	(240)	40	340	529	(539)	(200)	(10)	(1,174)	330		$ 493
Loss per common share (in dollars per share)												$ 0
Loss attributable to common shares												$ 0
Common shares used in computing loss per share (in shares)												0
Loss preferred per share (in dollars per share)												$ 0
Loss attributable to preferred stock												$ 0
Preferred shares used in computing loss per share (In shares)												0
Debentures [Member]
Statement of Operations and Other Comprehensive Loss [Abstract]
Revenues, net				0	0	0		0		0		$ 0
Cost of revenues												0
Gross profit				0	0	0		0		0
General and administrative												0
Loss from operations					0	0		0		0
Other (expenses) income, net				(5,806)	3,281	(1,262)		2,019		(3,787)		(3,787)
Income (loss) before income taxes				(5,806)	3,281	(1,262)		2,019		(3,787)		(3,787)
Net loss				(5,806)	3,281	(1,262)		2,019		(3,787)		$ (3,787)
Loss per common share (in dollars per share)												$ 0
Loss attributable to common shares												$ 0
Common shares used in computing loss per share (in shares)												0
Loss preferred per share (in dollars per share)												$ 0
Loss attributable to preferred stock												$ 0
Preferred shares used in computing loss per share (In shares)												0
Intangible Impairment [Member]
Statement of Operations and Other Comprehensive Loss [Abstract]
Revenues, net	0	0	0	0	0	0	0	0	0	0		$ 0
Cost of revenues	50	50	50				100		150			(500)
Gross profit	(50)	(50)	(50)	0	0	0	(100)	0	(150)	0		500
General and administrative							0		0			0
Loss from operations	(50)	(50)	(50)		0	0	(100)	0	(150)	0		500
Other (expenses) income, net	0	0	0	0	0	0	0	0	0	0		0
Income (loss) before income taxes	(50)	(50)	(50)	0	0	0	(100)	0	(150)	0		500
Net loss	(50)	(50)	(50)	0	0	0	(100)	0	(150)	0		$ 500
Loss per common share (in dollars per share)												$ 0
Loss attributable to common shares												$ 0
Common shares used in computing loss per share (in shares)												0
Loss preferred per share (in dollars per share)												$ 0
Loss attributable to preferred stock												$ 0
Preferred shares used in computing loss per share (In shares)												0
Deferred Revenue [Member]
Statement of Operations and Other Comprehensive Loss [Abstract]
Revenues, net	(140)	(124)	295	195	1	197	171	198	31	393		$ 415
Cost of revenues							0		0			0
Gross profit	(140)	(124)	295	195	1	197	171	198	31	393		415
General and administrative					0		0		0			0
Loss from operations	(140)	(124)	295	195	1	197	171	198	31	393		415
Other (expenses) income, net	0	0	0	0	0	0	0	0	0	0		0
Income (loss) before income taxes	(140)	(124)	295	195	1	197	171	198	31	393		415
Net loss	(140)	(124)	295	195	1	197	171	198	31	393		415
Other Immaterial Adjustments [Member]
Statement of Operations and Other Comprehensive Loss [Abstract]
Revenues, net	(23)	(21)	(23)	(24)	(27)	(25)	(44)	(52)	(67)	(76)		(101)
Cost of revenues							0		0			0
Gross profit	23	(21)	(23)	(24)	(27)	(25)	(44)	(52)	(67)	(76)		(101)
General and administrative	(23)	(21)	(23)	(24)	(27)	(25)	(44)	(52)	(67)	(76)		(101)
Loss from operations	0	0	0		0	0	0	0	0	0		0
Other (expenses) income, net	0	0	0	0	0	0	0	0	0	0		0
Income (loss) before income taxes	0	0	0	0	0	0	0	0		0
Net loss	$ 0	$ 0	0	$ 0	$ 0	0	0	0		0		0
Effect of Adoption Higher / (Lower) [Member]
Statement of Operations and Other Comprehensive Loss [Abstract]
Net loss			$ (181)			$ (1,739)	$ (332)	$ (1,925)	$ (1,624)	$ (3,481)		$ (2,683)