Business Segment Information - Summary of Net Sales by Geographic Destination for Each Reporting Unit (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 121,078	$ 111,708	$ 111,547	$ 108,709	$ 116,896	$ 105,247	$ 108,942	$ 102,738	$ 453,042	$ 433,823	$ 409,788
Bone Growth Therapies [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									195,252	185,900	176,561
Spinal Implants [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									91,658	81,957	72,632
Biologics [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									59,684	62,724	57,912
Orthofix Extremities [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									106,448	103,242	102,683
U.S. [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									355,353	345,145	316,873
U.S. [Member] | Bone Growth Therapies [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									195,189	185,853	176,510
U.S. [Member] | Spinal Implants [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									72,137	69,704	57,772
U.S. [Member] | Biologics [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									59,668	62,670	57,574
U.S. [Member] | Orthofix Extremities [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									28,359	26,918	25,017
International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									97,689	88,678	92,915
International [Member] | Bone Growth Therapies [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									63	47	51
International [Member] | Spinal Implants [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									19,521	12,253	14,860
International [Member] | Biologics [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									16	54	338
International [Member] | Orthofix Extremities [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									$ 78,089	$ 76,324	$ 77,666