Business Segment Information - Summary of Net Margin, Defined as Gross Profit Less Sales and Marketing Expenses from Continuing Operations by SBU Reporting Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Sales Information [Line Items]
Total net margin	$ 34,728	$ 27,666	$ 100,356	$ 89,477
General and administrative	18,814	12,933	53,643	46,355
Research and development	6,572	6,361	18,818	20,653
Amortization of intangible assets	508	616	1,753	1,725
Costs related to the accounting review and restatement	2,326	2,664	12,959	2,664
Impairment of goodwill		19,193		19,193
Operating income	(6,508)	14,101	(13,183)	1,113
Operating Segments [Member] | BioStim [Member]
Sales Information [Line Items]
Total net margin	16,442	13,397	49,168	48,614
Operating Segments [Member] | Biologics [Member]
Sales Information [Line Items]
Total net margin	6,504	6,737	19,500	18,463
Operating Segments [Member] | Extremity Fixation [Member]
Sales Information [Line Items]
Total net margin	8,361	7,089	21,952	17,980
Operating Segments [Member] | Spine Fixation [Member]
Sales Information [Line Items]
Total net margin	3,958	913	11,147	5,796
Corporate, Non-Segment [Member]
Sales Information [Line Items]
Total net margin	(537)	(470)	(1,411)	(1,376)
Material Reconciling Items [Member]
Sales Information [Line Items]
General and administrative	18,814	12,933	53,643	46,355
Research and development	6,572	6,361	18,818	20,653
Amortization of intangible assets	508	616	1,753	1,725
Costs related to the accounting review and restatement	2,326	2,664	12,959	2,664
Impairment of goodwill		19,193		19,193
Operating income	$ 6,508	$ 14,101	$ 13,183	$ (1,113)