The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Intangibles, net (Details) - USD ($) $ in Thousands	6 Months Ended
Intangibles, net (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Patents and licensed technologies, gross	$ 17,274		$ 16,374
Accumulated amortization	(3,976)		(2,962)
Patents and licensed technologies, net	13,298		13,412
Amortization expense of intangible assets	1,014	$ 908
Estimated amortization expense [Abstract]
Remaining 2017	1,066
2018	2,133
2019	2,132
2020	1,615
2021	1,415
Thereafter	4,937
Patents and licensed technologies, net	13,298		13,412
Core Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Patents and licensed technologies, gross	5,974		5,974
Product Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Patents and licensed technologies, gross	2,000		2,000
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Patents and licensed technologies, gross	6,900		6,900
Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Patents and licensed technologies, gross	1,500		1,500
Distribution Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Patents and licensed technologies, gross	$ 900		$ 0