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Intangible Assets (Company's Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Cost	$ 56,271	$ 56,271
Accumulated Amortization	$ 5,849	5,507
Fusion Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	10 years
Cost	$ 9,242	9,242
Accumulated Amortization	$ 3,928	3,697
Clamp and Probe Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Cost	$ 829	829
Accumulated Amortization	$ 829	829
SUBTLE Access Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years
Cost	$ 2,179	2,179
Accumulated Amortization	1,092	981
IPR&D [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	$ 44,021	$ 44,021

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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