The Company and Summary of Significant Accounting Policies Narrative (Details) (USD $)
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12 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2013
Minimum [Member]
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Sep. 29, 2013
Minimum [Member]
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Sep. 29, 2013
Minimum [Member]
Service Provider [Member]
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Sep. 29, 2013
Minimum [Member]
Service Provider [Member]
10% decrease to the fair value of reporting unit [Member]
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Dec. 31, 2013
Maximum [Member]
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Sep. 29, 2013
Maximum [Member]
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Dec. 31, 2013
Accounts Receivable [Member]
Best Buy Inc [Member]
Customer Concentration Risk [Member]
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Dec. 31, 2012
Accounts Receivable [Member]
Best Buy Inc [Member]
Customer Concentration Risk [Member]
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Dec. 31, 2013
Sierra Wireless AirCard Business [Member]
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Significant Accounting Policies [Line Items] | ||||||||||||
The percentage of fair value over (below) carrying value | 15.00% | 15.00% | 4.00% | 219.00% | ||||||||
Concentration Risk, Percentage | 21.00% | 22.00% | ||||||||||
Cost method investment | $ 1,322,000 | $ 1,322,000 | ||||||||||
Gain (Loss) on Sale of Investments | 0 | 3,126,000 | 0 | |||||||||
Goodwill, Impairment Loss | 0 | 0 | 0 | |||||||||
Finite-Lived Intangible Asset, Useful Life | 4 years | 10 years | ||||||||||
Standard Warranty Replacement of a Defective Product, Period | 1 year | |||||||||||
Shipping, Handling and Transportation Costs | 11,600,000 | 12,100,000 | 13,900,000 | |||||||||
Marketing and Advertising Expense | 18,000,000 | 19,000,000 | 21,700,000 | |||||||||
Foreign Currency Transaction (Loss ) Gain, before Tax | (1,592,000) | 204,000 | 131,000 | |||||||||
Other than Temporary Impairment Losses, Investments | 0 | 0 | ||||||||||
Impairment charges | 2,000,000 | 0 | 0 | 2,000,000 | ||||||||
Impairment of Intangible Assets (Excluding Goodwill) | $ 0 | $ 0 | $ 0 |