Balance Sheet Components (Tables)
 12 Months Ended
Dec. 31, 2013
Balance Sheet Components  
Schedule of inventories

Inventories consisted of the following (in thousands):

 
   December 31,
2012		   December 31,
2013		  

Finished goods

   $ 12,306   $ 14,061  

Component parts

     209     1,251  
           
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   $ 12,515   $ 15,312  
           
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Schedule of property and equipment, net

 Property and equipment, net consisted of the following (in thousands):

 
   December 31,
2012		   December 31,
2013		  

Computer equipment and software

   $ 3,518   $ 4,152  

Manufacturing tooling and test equipment

     2,731     2,652  

Furniture and fixtures

     1,801     2,046  

Lab and warehouse equipment

     1,974     2,374  

Marketing equipment

     419     604  

Leasehold improvements

     803     1,450  
           
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     11,246     13,278  

Less: accumulated depreciation

     (8,580 )   (9,335 )
           
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   $ 2,666   $ 3,943  
           
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Schedule of intangible assets, net

 Intangible assets, net consisted of the following (in thousands):

 
   December 31,
2012		   December 31,
2013		  

Acquired technology

   $ 1,357   $ 1,678  

Less: accumulated amortization

     (431 )   (750 )
           
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   $ 926   $ 928  
           
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Schedule of other assets

Other assets consisted of the following (in thousands):

 
   December 31,
2012		   December 31,
2013		  

Prepaid licensing

   $ 700   $ 716  

Deposits

     187     404  
           
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   $ 887   $ 1,120  
           
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Schedule of accrued liabilities

Accrued liabilities consisted of the following (in thousands):

 
   December 31,
2012		   December 31,
2013		  

Current portion of settlement obligations (see Note 6)

   $ 2,229   $ 907  

Sales returns and warranty accruals

     2,045     2,137  

Compensation accruals

     1,495     3,233  

Other accrued liabilities

     802     544  
           
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   $ 6,571   $ 6,821  
           
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