SEGMENT AND GEOGRAPHIC INFORMATION Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Revenues	$ 33,201	$ 33,461	$ 64,600	$ 65,775
United States
Segment Reporting Information [Line Items]
Revenues	30,012	29,580	58,556	58,942
International
Segment Reporting Information [Line Items]
Revenues	3,189	3,881	6,044	6,833
Orthobiologics
Segment Reporting Information [Line Items]
Revenues	16,805	17,026	33,463	33,055
Spinal fusion hardware
Segment Reporting Information [Line Items]
Revenues	$ 16,396	$ 16,435	$ 31,137	$ 32,720