Business segment information (Tables)

12 Months Ended

Dec. 31, 2017

Schedule of Net Sales by Reporting Segment

The table below presents net sales by reporting segment:

	Year Ended December 31,
	2017					2016					2015
(U.S. Dollars, in thousands)	Net Sales		Percent of Total Net Sales			Net Sales		Percent of Total Net Sales			Net Sales		Percent of Total Net Sales
BioStim	$	185,900		42.9	%	$	176,561		43.1	%	$	164,955		41.6	%
Extremity Fixation		103,242		23.8	%		102,683		25.1	%		96,034		24.2	%
Spine Fixation		81,957		18.9	%		72,632		17.7	%		75,668		19.1	%
Biologics		62,724		14.4	%		57,912		14.1	%		59,832		15.1	%
Net sales	$	433,823		100.0	%	$	409,788		100.0	%	$	396,489		100.0	%

Summary of Non-GAAP Net Margin by Reporting Segment

The following table presents Non-GAAP net margin, and internal metric that the Company defines as gross profit less sales and marketing expense, by reporting segment:

	Year Ended December 31,
(U.S. Dollars, in thousands)	2017			2016			2015
BioStim	$	77,369		$	75,469		$	67,878
Extremity Fixation		31,071			30,526			29,493
Spine Fixation		8,730			8,650			8,547
Biologics		25,692			26,891			27,226
Corporate		(446	)		(888	)		(1,260	)
Non-GAAP net margin	$	142,416		$	140,648		$	131,884
General and administrative		74,388			74,404			87,157
Research and development		29,700			28,803			26,389
SEC / FCPA matters and related costs		(2,483	)		2,005			9,083
Charges related to U.S. Government resolutions		—			14,369			—
Operating income	$	40,811		$	21,067		$	9,255
Interest income (expense), net		(416	)		763			(489	)
Other expense, net		(4,004	)		(2,806	)		(259	)
Income before income taxes	$	36,391		$	19,024		$	8,507

Schedule of Depreciation and Amortization by Reporting Segment

The following table presents depreciation and amortization by reporting segment:

	Year Ended December 31,
(U.S. Dollars, in thousands)	2017		2016		2015
BioStim	$	2,133	$	2,754	$	2,933
Extremity Fixation		6,040		5,742		6,636
Spine Fixation		6,949		8,118		10,050
Biologics		752		1,011		1,157
Corporate		4,250		3,216		147
Total	$	20,124	$	20,841	$	20,923

Summary of Net Sales by Geographic Destination

The following data includes net sales by geographic destination:

(U.S. Dollars, in thousands)	2017		2016		2015
U.S.	$	345,145	$	316,873	$	305,505
Italy		17,059		16,664		15,655
United Kingdom		8,725		10,362		11,376
Brazil		10,356		11,334		13,512
Others		52,538		54,555		50,441
Net sales	$	433,823	$	409,788	$	396,489

Summary of Property, Plant and Equipment of Reporting Segments by Geographic Area

The following data includes property, plant and equipment by geographic area:

(U.S. Dollars, in thousands)	2017		2016
U.S.	$	34,008	$	38,398
Italy		7,658		7,013
United Kingdom		382		617
Brazil		475		769
Others		2,616		2,119
Total	$	45,139	$	48,916