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Intangible Assets and Goodwill (Tables)

12 Months Ended

Dec. 31, 2017

Intangible Assets and Goodwill [Abstract]

Company's Intangible Assets



			2017						2016
	Estimated					Accumulated						Accumulated
	Useful Life		Cost			Amortization			Cost			Amortization
Fusion technology	10 years		$	9,242		$	3,697		$	9,242		$	2,773
Clamp & probe technology	3 years			829			829			829			829
SUBTLE access technology	5 years			2,179			981			2,179			538
IPR&D				44,021			—			44,021			—
Total			$	56,271		$	5,507		$	56,271		$	4,140



Future Amortization Expense Related to Intangible Assets with Definite Lives



2018		$	1,367
2019			1,367
2020			1,235
2021			924
2022			925
2023 and thereafter			925
Total		$	6,743



Summary of Company's Goodwill



Net carrying amount as of December 31, 2015		$	105,257
Additions (Impairments)			—
Net carrying amount as of December 31, 2016			105,257
Additions (Impairments)			—
Net carrying amount as of December 31, 2017		$	105,257



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Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
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Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule.

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-Name Accounting Standards Codification
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-SubTopic 20
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