Revenue recognition and accounts receivable (Tables)

9 Months Ended

Sep. 30, 2019

Revenue Recognition And Accounts Receivable [Abstract]

Schedule of Net Sales by Major Product Category by Reporting Segment

The tables below present net sales by major product category by reporting segment:

	Three Months Ended September 30,
(U.S. Dollars, in thousands)	2019		2018		Change
Bone Growth Therapies	$	48,836	$	48,059		1.6	%
Spinal Implants		22,947		22,102		3.8	%
Biologics		16,308		14,636		11.4	%
Global Spine		88,091		84,797		3.9	%
Global Extremities		25,408		26,911		-5.6	%
Net sales	$	113,499	$	111,708		1.6	%

	Nine Months Ended September 30,
(U.S. Dollars, in thousands)	2019		2018		Change
Bone Growth Therapies	$	146,228	$	142,433		2.7	%
Spinal Implants		69,076		66,689		3.6	%
Biologics		48,784		43,639		11.8	%
Global Spine		264,088		252,761		4.5	%
Global Extremities		74,373		79,203		-6.1	%
Net sales	$	338,461	$	331,964		2.0	%

Schedule of Net Sales

The table below presents net sales, which includes product sales and marketing service fees, for the three and nine months ended September 30, 2019 and 2018.

	Three Months Ended September 30,				Nine Months Ended September 30,
(U.S. Dollars, in thousands)	2019		2018		2019		2018
Product sales	$	97,833	$	97,604	$	291,632	$	289,946
Marketing service fees		15,666		14,104		46,829		42,018
Net sales	$	113,499	$	111,708	$	338,461	$	331,964