Segment Information and Concentrations of Risk (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Net revenues by reportable segment:
Net revenues by operating segment:	$ 71,017	$ 113,263	$ 273,613	$ 293,068
Operating income (loss) :
Operating loss	(31,853)	(6,048)	(74,125)	(31,219)
Identifiable assets by reportable segment:
Identifiable assets by reportable segment:	165,602		165,602		249,179
Mobile Computing Products [Member]
Net revenues by reportable segment:
Net revenues by operating segment:	65,189	102,691	248,620	258,268
Operating income (loss) :
Operating loss	(7,513)	1,311	(11,701)	(14,359)
Identifiable assets by reportable segment:
Identifiable assets by reportable segment:	148,855		148,855		181,180
M2M Products and Solutions [Member]
Net revenues by reportable segment:
Net revenues by operating segment:	5,828	10,572	24,993	34,800
Operating income (loss) :
Operating loss	(24,340)	(7,359)	(62,424)	(16,860)
Identifiable assets by reportable segment:
Identifiable assets by reportable segment:	$ 16,747		$ 16,747		$ 67,999