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Revenue recognition
 9 Months Ended
Sep. 30, 2017
Revenue Recognition [Abstract]  
Revenue recognition

8. Revenue recognition

 

The table below presents net sales, which includes product sales and marketing service fees, for both the three and nine months ended September 30, 2017 and 2016.

 

 

 

Three Months Ended

September 30,

 

 

Nine Months Ended

September 30,

 

(U.S. Dollars, in thousands)

 

2017

 

 

2016

 

 

2017

 

 

2016

 

Product sales

 

$

90,645

 

 

$

84,997

 

 

$

272,954

 

 

$

261,490

 

Marketing service fees

 

 

14,602

 

 

 

13,500

 

 

 

43,973

 

 

 

39,761

 

Net sales

 

$

105,247

 

 

$

98,497

 

 

$

316,927

 

 

$

301,251

 

 

Product sales primarily consist of stimulation devices and fixation products. Marketing service fees are received from the Musculoskeletal Transplant Foundation (“MTF”) based on total sales of biologics tissues.