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Organization and Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Allowance for Sales Returns and Doubtful Accounts
Activity under the Company’s allowance for sales returns and doubtful accounts was comprised as follows (in thousands):
 
 
Year ended December 31,
 
2013
 
2012
 
2011
Balance at beginning of year
$
2,878

 
$
2,024

 
$
2,433

Charged to revenue
776

 
2,190

 
2,039

Charged to (reversal of) expense
(180
)
 
404

 
(100
)
Utilization
(2,022
)
 
(1,740
)
 
(2,348
)
Balance at end of year
$
1,452

 
$
2,878

 
$
2,024