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Segment Information and Concentrations of Risk (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net revenues :
Net revenues	$ 70,675	$ 71,017	$ 102,446	$ 100,150	$ 109,794	$ 113,263	$ 118,021	$ 61,784	$ 344,288	$ 402,862	$ 338,942
Operating income (loss) :
Operating loss									(88,743)	(33,727)	(25,002)
Identifiable assets:
Identifiable assets	161,531				249,179				161,531	249,179
Mobile Computing Products [Member]
Net revenues :
Net revenues									312,508	358,106	332,464
Operating income (loss) :
Operating loss									(22,924)	(13,764)	(23,027)
Identifiable assets:
Identifiable assets	141,045				181,180				141,045	181,180
M2M Products and Solutions [Member]
Net revenues :
Net revenues									31,780	44,756	6,478
Operating income (loss) :
Operating loss									(65,819)	(19,963)	(1,975)
Identifiable assets:
Identifiable assets	$ 20,486				$ 67,999				$ 20,486	$ 67,999

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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