Intangible Assets, net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets, Net [Abstract]
Balance							$ 16,100	$ 16,386
Accumulated amortization							(6,335)	(4,561)
Intangible assets, net							9,765	11,825
Amortization expense of intangible assets							1,834	1,995
Finite lived intangible assets, gross, write-off	$ 0	$ 0	$ 0	$ 0	$ 0	$ 23	0	23
Estimated amortization expense [Abstract]
2019							1,810
2020							1,610
2021							1,410
2022							1,410
Thereafter							3,525
Intangible assets, net							$ 9,765	11,825
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
MelaFind Product [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite lived intangible assets, gross, write-off								23
Write-off of accumulated amortization of discontinued operations								251
Nordlys Product [Member] | Ellipse New Agreement [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Monthly license fee paid							$ 33
License fees							1,100
Core Technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance							5,700	5,700
Accumulated amortization							(1,995)
Intangible assets, net							3,705
Estimated amortization expense [Abstract]
Intangible assets, net							3,705
Core Technology [Member] | MelaFind Product [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite lived intangible assets, gross, write-off								274
Product Technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance							2,000	2,000
Accumulated amortization							(1,400)
Intangible assets, net							600
Estimated amortization expense [Abstract]
Intangible assets, net							600
Customer Relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance							6,900	6,900
Accumulated amortization							(2,415)
Intangible assets, net							4,485
Estimated amortization expense [Abstract]
Intangible assets, net							4,485
Tradenames [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance							1,500	1,500
Accumulated amortization							(525)
Intangible assets, net							975
Estimated amortization expense [Abstract]
Intangible assets, net							975
Distribution Rights [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance							0	286
Distribution Rights [Member] | Selling and Marketing Expense [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Finite lived intangible assets, gross, write-off							237
Write-off of intangible assets, finite-lived							11
Distribution Rights [Member] | Ellipse New Agreement [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance		$ 900						286
Gain on contract termination								$ 40
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