Goodwill, Trademarks and Other Intangible Assets (Details 3) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
Jun. 29, 2014	Dec. 31, 2013
Net carrying value of intangible assets with finite lives
Gross Carrying Amount	$ 22,037	$ 22,071
Accumulated Amortization	(10,271)	(8,656)
Net	11,766us-gaap_FiniteLivedIntangibleAssetsNet	13,415us-gaap_FiniteLivedIntangibleAssetsNet
Expected annual amortization expense
2014	3,270
2015	2,783
2016	1,926
2017	1,186
2018	871
Customer relationship Canadian Government
Net carrying value of intangible assets with finite lives
Gross Carrying Amount	2,360	2,369
Accumulated Amortization	(714)	(678)
Net	1,646	1,691
Estimated Useful Life	30 years	30 years
Customer relationships other
Net carrying value of intangible assets with finite lives
Gross Carrying Amount	6,137	6,160
Accumulated Amortization	(4,229)	(4,077)
Net	1,908	2,083
Estimated Useful Life	20 years	20 years
License agreements
Net carrying value of intangible assets with finite lives
Gross Carrying Amount	5,240	5,240
Accumulated Amortization	(1,614)	(805)
Net	3,626	4,435
Estimated Useful Life	6 years	6 years
Backlog
Net carrying value of intangible assets with finite lives
Gross Carrying Amount	1,720	1,722
Accumulated Amortization	(916)	(604)
Net	804	1,118
Estimated Useful Life	3 years	3 years
Technology-based intangibles
Net carrying value of intangible assets with finite lives
Gross Carrying Amount	6,580	6,580
Accumulated Amortization	(2,798)	(2,492)
Net	$ 3,782	$ 4,088
Technology-based intangibles \| Minimum
Net carrying value of intangible assets with finite lives
Estimated Useful Life	15 years	15 years
Technology-based intangibles \| Maximum
Net carrying value of intangible assets with finite lives
Estimated Useful Life	20 years	20 years

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

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=26713463&loc=d3e16323-109275

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Amount of amortization expense expected to be recognized in the remainder of the fiscal year following the latest fiscal year ended for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

No definition available.

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Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for 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)(3)

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Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for 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)(3)

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Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for 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)(3)

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Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for 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)(3)

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- Definition

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

+ References

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

+ References

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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.

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