Immaterial Corrections to Prior Period Financial Statements (Tables)
3 Months Ended
Mar. 31, 2013
Immaterial Corrections to Prior Period Financial Statements [Abstract]  
Summary of effects of correction of errors on consolidated financial statements
                 
    Three Months Ended
March 31, 2012
 
    As
Previously
Reported
    As
Corrected
 

Condensed Consolidated Statements of Operations and Comprehensive Income

               

Revenue

  $ 59,510     $ 59,408  

Cost of revenue

    26,042       26,086  

Gross profit

    33,468       33,322  

Income from operations

    161       428  

Income before provision for income tax

    329       608  

Net income

    358       289  
     

Condensed Consolidated Statements of Cash Flows

               

Net income

  $ 358     $ 289  

Depreciation and amortization

    2,939       2,846  

Change in operating assets and liabilities

               

Inventories

    3,881       3,953  

Deferred income tax

    (569 )      86  

Accrued liabilities and deferred revenue

    211       (342 ) 

Net cash provided by operating activities

    6,118       6,130  

Exchange rate changes effect on cash and cash equivalents

    (283 )      (295 )