Intangible Assets, net (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Finite-Lived Intangible Assets, Net [Abstract]
Balance	$ 15,600				$ 15,600		$ 15,886
Accumulated amortization	(5,733)				(5,733)		(4,561)
Intangible assets, net	9,867				9,867		11,325
Amortization expense of intangible assets	402			$ 505	1,231	$ 1,519
Estimated amortization expense [Abstract]
Remaining 2018	402				402
2019	1,610				1,610
2020	1,510				1,510
2021	1,410				1,410
2022	1,410				1,410
Thereafter	3,525				3,525
Intangible assets, net	9,867				$ 9,867		11,325
Minimum [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Estimated useful life					3 years
Maximum [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Estimated useful life					10 years
Core Technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance	5,700				$ 5,700		5,700
Accumulated amortization	(1,853)				(1,853)		(1,425)
Intangible assets, net	3,847				3,847		4,275
Estimated amortization expense [Abstract]
Intangible assets, net	3,847				3,847		4,275
Core Technology [Member] | MelaFind Product [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite lived intangible assets, gross, write-off				274		274
Finite lived intangible assets, accumulated Amortization, write-off				251		251
Core Technology [Member] | MelaFind Product [Member] | Cost of Revenues [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Write-off of Intangible Assets, Finite-lived				$ 23		$ 23
Product Technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance	1,500				1,500		1,500
Accumulated amortization	(1,150)				(1,150)		(1,000)
Intangible assets, net	350				350		500
Estimated amortization expense [Abstract]
Intangible assets, net	350				350		500
Customer Relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance	6,900				6,900		6,900
Accumulated amortization	(2,243)				(2,243)		(1,725)
Intangible assets, net	4,657				4,657		5,175
Estimated amortization expense [Abstract]
Intangible assets, net	4,657				4,657		5,175
Tradenames [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance	1,500				1,500		1,500
Accumulated amortization	(487)				(487)		(375)
Intangible assets, net	1,013				1,013		1,125
Estimated amortization expense [Abstract]
Intangible assets, net	$ 1,013				$ 1,013		1,125
Distribution Rights [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance							286
Accumulated amortization							(36)
Intangible assets, net							250
Finite lived intangible assets, gross, write-off		$ 237
Estimated amortization expense [Abstract]
Intangible assets, net							$ 250
Distribution Rights [Member] | Selling and Marketing Expense [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Write-off of Intangible Assets, Finite-lived		$ 11
Distribution Rights [Member] | Nordlys Product [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite lived intangible assets, gross, write-off			$ 286
Finite lived intangible assets, accumulated Amortization, write-off			60
Distribution Rights [Member] | Nordlys Product [Member] | Selling and Marketing Expense [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Write-off of Intangible Assets, Finite-lived			$ 226