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The Company and Summary of Significant Accounting Policies Narrative (Details) (USD $)
12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Minimum [Member]
Sep. 29, 2013
Minimum [Member]
Sep. 29, 2013
Minimum [Member]
Service Provider [Member]
Sep. 29, 2013
Minimum [Member]
Service Provider [Member]
10% decrease to the fair value of reporting unit [Member]
Dec. 31, 2013
Maximum [Member]
Sep. 29, 2013
Maximum [Member]
Dec. 31, 2013
Accounts Receivable [Member]
Best Buy Inc [Member]
Customer Concentration Risk [Member]
Dec. 31, 2012
Accounts Receivable [Member]
Best Buy Inc [Member]
Customer Concentration Risk [Member]
Dec. 31, 2013
Sierra Wireless AirCard Business [Member]
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