Business Acquisitions Business Acquisitions (Details textual) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Finite-lived intangible asset	$ 5,800,000
Marine & Remote Sensing Solutions [Member]
Business Acquisition [Line Items]
Purchase price		3,200,000
Finite-lived intangible asset		375,000
Goodwill		2,500,000
DigitalOptics Charlotte
Business Acquisition [Line Items]
Purchase price		14,908,000
Net tangible assets		9,987,000
Finite-lived intangible asset		2,520,000
Goodwill		2,401,000
Goodwill, Expected Tax Deductible Amount	$ 0

Goodwill acquired from acquisitions

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- Definition

Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

+ References

No definition available.

+ Details

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- Definition

The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479

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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 55

-Paragraph 37

-URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464

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- Definition

Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

+ References

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