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Summary of significant accounting policies (Tables)
 6 Months Ended
Jun. 30, 2013
Summary of significant accounting policies  
Summary of the entity's revenue by primary revenue source

 

 

Three Months Ended
June 30,

 

Six Months Ended
June 30,

 

 

 

2013

 

2012

 

2013

 

2012

 

Revenue:

 

 

 

 

 

 

 

 

 

Retail subscription

 

$

8,731

 

$

8,017

 

$

16,798

 

$

15,864

 

Retail single-use

 

2,830

 

3,877

 

5,416

 

7,494

 

Wholesale

 

12,339

 

11,122

 

23,894

 

23,206

 

Advertising and other

 

2,339

 

1,286

 

3,265

 

1,925

 

Total revenue

 

$

26,239

 

$

24,302

 

$

49,373

 

$

48,489