Patents and Licensed Technologies, net (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Patents and licensed technologies, net	$ 6,272	$ 7,247
Estimated amortization expense [Abstract]
Patents and licensed technologies, net	6,272	7,247
Core Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Patents and licensed technologies, gross	$ 5,974	5,974
Estimated useful life	10 years
Core Technology [Member] \| XTRAC and VTRAC [Member]
Finite-Lived Intangible Assets [Line Items]
Patents and licensed technologies, net	$ 5,700
Estimated useful life	10 years
Estimated amortization expense [Abstract]
Patents and licensed technologies, net	$ 5,700
Product Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Patents and licensed technologies, gross	$ 2,000	2,000
Estimated useful life	5 years
Product Technology [Member] \| XTRAC and VTRAC [Member]
Finite-Lived Intangible Assets [Line Items]
Patents and licensed technologies, net	$ 2,000
Estimated useful life	5 years
Estimated amortization expense [Abstract]
Patents and licensed technologies, net	$ 2,000
Patents and Licensed Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Patents and licensed technologies, gross	7,974	7,974
Accumulated amortization	(1,702)	(727)
Patents and licensed technologies, net	6,272	7,247
Amortization expense	975	490
Estimated amortization expense [Abstract]
2017	975
2018	975
2019	975
2020	775
2021	575
Thereafter	1,997
Patents and licensed technologies, net	$ 6,272	$ 7,247

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

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- 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

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References