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Business Combinations (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Feb. 11, 2016
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Dec. 31, 2009
Business Acquisition [Line Items]          
Intangible assets, weighted-average useful life   8 years   10 years  
Amortization expense related to intangible assets   $ 8,800,000 $ 3,900,000    
Technology-Based Intangible Assets [Member]          
Business Acquisition [Line Items]          
Intangible assets, weighted-average useful life   8 years   9 years  
Customer-Related Intangible Assets [Member]          
Business Acquisition [Line Items]          
Intangible assets, weighted-average useful life   9 years   8 years  
Ellipse Technologies Inc [Member]          
Business Acquisition [Line Items]          
Business acquisition. date of acquisition   Feb. 11, 2016      
Business acquisition, purchase price $ 380,000,000        
Business combination, holdback service period 6 months        
Business acquisition, potential future milestone payment $ 30,000,000        
Cash payment on purchase of outstanding shares 382,174,000        
Contingent liability $ 18,800,000        
Revenue from operation of NSO   $ 5,800,000      
Loss from operation of NSO   (1,600,000)      
Ellipse Technologies Inc [Member] | Amortization Charges [Member]          
Business Acquisition [Line Items]          
Amortization expense related to intangible assets   6,500,000      
Ellipse Technologies Inc [Member] | Fair Value Adjustment To Inventory [Member]          
Business Acquisition [Line Items]          
Fair value adjustment of acquired inventory   7,400,000      
Ellipse Technologies Inc [Member] | Acquisition Related Costs [Member]          
Business Acquisition [Line Items]          
Acquisition costs related to merger   4,000,000      
Ellipse Technologies Inc [Member] | Deferred Revenue Adjustments [Member]          
Business Acquisition [Line Items]          
Deferred revenue adjustments and related tax effects   (100,000)      
Ellipse Technologies Inc [Member] | Selling, Marketing and Administrative Expenses [Member]          
Business Acquisition [Line Items]          
Acquisition costs related to merger   $ 4,000,000      
Ellipse Technologies Inc [Member] | Technology-Based Intangible Assets [Member]          
Business Acquisition [Line Items]          
Intangible assets, weighted-average useful life   7 years      
Ellipse Technologies Inc [Member] | Customer-Related Intangible Assets [Member]          
Business Acquisition [Line Items]          
Intangible assets, weighted-average useful life   9 years      
Ellipse Technologies Inc [Member] | Trade Name Related Intangible Assets [Member]          
Business Acquisition [Line Items]          
Intangible assets, weighted-average useful life   7 years      
Progentix Orthobiology [Member]          
Business Acquisition [Line Items]          
Advanced loan accordance to loan agreement   $ 5,300,000      
Accrued interest rate of loan   6.00%      
Progentix Orthobiology [Member] | Preferred Stock Purchase Agreement [Member]          
Business Acquisition [Line Items]          
Cash payment on purchase of outstanding shares         $ 10,000,000
Percentage of ownership Interests acquired         40.00%