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Fair Value Measurements (Details Textual) (USD $)	12 Months Ended				12 Months Ended
Fair Value Measurements (Details Textual) (USD $)	Dec. 31, 2009	Dec. 31, 2011	Dec. 31, 2010	Apr. 05, 2009 Siemens Customer Relationships [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member]	Dec. 31, 2010 Fair Value, Measurements, Recurring [Member]	Dec. 31, 2009 Fair Value, Measurements, Recurring [Member]	Apr. 05, 2009 Fair Value, Measurements, Nonrecurring [Member] Siemens Customer Relationships [Member]
Fair Value Measurements (Additional Textual) [Abstract]
Intangible asset impairment charge (Note 7)	$ 1,000,000
Fair Value Measurements (Textual) [Abstract]
Other-than-temporary impairment loss					0	0	0
Fair value								300,000
Intangible assets, net		$ 18,910,000	$ 23,130,000	$ 1,300,000

The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.

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