Intangible Assets, net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Finite-Lived Intangible Assets, Net [Abstract]
Balance	$ 16,100
Accumulated amortization	(6,788)
Intangible assets, net	9,312
Amortization expense of intangible assets	453	$ 477
Impairment of intangible assets	0
Estimated amortization expense [Abstract]
Remaining 2019	1,357
2020	1,610
2021	1,410
2022	1,410
2023	1,410
Thereafter	2,115
Intangible assets, net	9,312
Core Technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance	5,700
Accumulated amortization	(2,138)
Intangible assets, net	3,562
Estimated amortization expense [Abstract]
Intangible assets, net	3,562
Product Technology [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance	2,000
Accumulated amortization	(1,500)
Intangible assets, net	500
Estimated amortization expense [Abstract]
Intangible assets, net	500
Customer Relationships [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance	6,900
Accumulated amortization	(2,587)
Intangible assets, net	4,313
Estimated amortization expense [Abstract]
Intangible assets, net	4,313
Tradenames [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Balance	1,500
Accumulated amortization	(563)
Intangible assets, net	937
Estimated amortization expense [Abstract]
Intangible assets, net	$ 937
Distribution Rights [Member] | Selling and Marketing Expense [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Write-off of Intangible Assets, Finite-lived		226
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