Acquisition of Evolution Robotics, Inc. Acquisition of Evolution Robotics, Inc. (Details Textual) (Evolution Robotics, Inc. (ER) [Member], USD $) In Millions, unless otherwise specified	0 Months Ended
Oct. 02, 2012
Evolution Robotics, Inc. (ER) [Member]
Business Acquisition [Line Items]
Ownership percentage acquired	100.00%
Total acquisition date fair value of the consideration transferred	$ 74.8
Amount of purchase price placed into an escrow account to settle certain claims for indemnification for breaches	$ 8.88

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 805

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