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Accounts Receivable, Net and Revenue Concentrations (Tables)
12 Months Ended
Dec. 31, 2015
Receivables [Abstract]  
Schedule of Accounts Receivable
Accounts receivable, net were as follows:
 
 
December 31,
(In thousands)
2015
 
2014
Trade receivables, gross
$
119,090

 
$
91,605

Allowance for doubtful accounts
(822
)
 
(616
)
Allowance for sales returns
(507
)
 
(617
)
Net trade receivables
117,761

 
90,372

Other
4,040

 
7,617

Accounts receivable, net
$
121,801

 
$
97,989


Allowance for Doubtful Accounts
Changes in the allowance for doubtful accounts were as follows:
(In thousands)
Year Ended December 31,
2015
 
2014
 
2013
Balance at beginning of period
$
616

 
$
478

 
$
322

Additions to costs and expenses
299

 
249

 
190

(Write-offs)/FX effects
(93
)
 
(111
)
 
(34
)
Balance at end of period
$
822

 
$
616

 
$
478

Schedule of Significant Customers to Net Sales
Net sales to the following customers totaled more than 10% of our net sales: 
 
Year Ended December 31,
 
 
2015
 
2014
 
2013
 
 
Amount  (thousands)
 
% of Net
Sales
 
Amount  (thousands)
 
% of Net
Sales
 
Amount (thousands)
 
% of Net
Sales
 
Comcast Corporation
$
129,475

 
21.5
%
 
$

(1) 
%
(1) 
$

(1) 
%
(1) 
DIRECTV
74,857

 
12.4

 
58,622

 
10.4

 
82,679

 
15.6

 

(1) 
Net sales to this customer did not total more than 10% of our total net sales in the prior period.