Intangible Assets, net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Mar. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 15,886	$ 16,374
Accumulated amortization	(4,561)	(2,962)
Intangible assets, net	11,325	13,412
Amortization expense of intangible assets	1,995	1,815
Impairment of intangible assets	523	0
Estimated amortization expense [Abstract]
2018	1,905
2019	1,605
2020	1,470
2021	1,410
2022	1,410
Thereafter	3,525
Intangible assets, net	11,325	13,412
MelaFind Systems [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	23
Write-off of accumulated amortization of discontinued operations	251
Core Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	5,700	5,974
Core Technology [Member] | MelaFind Systems [Member]
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	274
Product Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	1,500	2,000
Impairment of intangible assets	500
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	6,900	6,900
Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	1,500	1,500
Distribution Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	286	$ 0
Distribution Rights [Member] | Ellipse New Agreement [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	286		$ 900
Gain on contract termination	$ 40