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Quarterly Financial Data (Unaudited) (Tables)
 12 Months Ended
Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]  
Summary of Quarterly Financial Data
The following financial information reflects all normal recurring adjustments, which are, in the opinion of management, necessary for a fair statement of the results of the interim periods. Summarized quarterly data for fiscal 2013 and 2012 are as follows (in thousands, except per share data):
 
 
Year ended December 31, 2013
 
1st
Quarter
 
2nd
Quarter
 
3rd
Quarter
 
4th
Quarter
Selected quarterly financial data:
 
 
 
 
 
 
 
Revenue
$
50,443

 
$
51,020

 
$
50,196

 
$
53,065

Gross profit
32,742

 
32,093

 
24,232

 
35,255

Total operating expenses
34,100

 
34,992

 
37,406

 
91,257

Net loss
(2,649
)
 
(4,661
)
 
(14,510
)
 
(60,407
)
Basic and diluted net loss per common share (1)
(0.03
)
 
(0.05
)
 
(0.15
)
 
(0.62
)
 
 
 
 
 
 
 
 
 
Year ended December 31, 2012
 
1st
Quarter
 
2nd
Quarter
 
3rd
Quarter
 
4th
Quarter
Selected quarterly financial data:
 
 
 
 
 
 
 
Revenue
$
48,461

 
$
48,235

 
$
46,839

 
$
52,743

Gross profit
31,819

 
30,196

 
29,633

 
32,120

Total operating expenses
31,944

 
33,947

 
31,606

 
36,108

Net loss
(1,261
)
 
(6,374
)
 
(2,469
)
 
(5,355
)
Basic and diluted net loss per common share (1)
(0.01
)
 
(0.07
)
 
(0.03
)
 
(0.06
)
 
(1)
Basic and diluted net loss per share is computed independently for each of the quarters presented. Therefore, the sum of the quarterly per share amounts will not necessarily equal the total for the year.