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Acquisition and Divestitures - Restore Flow Allografts - Additional Information (Detail) - USD ($)
3 Months Ended
Nov. 10, 2016
Mar. 31, 2017
Mar. 31, 2016
Business Acquisition [Line Items]      
Net revenue   $ 24,139,000 $ 20,258,000
Weighted average useful life   8 years 10 months 24 days  
Restore Flow Allografts [Member]      
Business Acquisition [Line Items]      
Initial purchase price $ 12,000,000    
Acquisition-related contingent consideration 900,000    
Additional payment description   A payment of $2 million is due not later than 15 days following the expiration of the 18 month period following the closing date, subject to reductions as specified in the agreement for each calendar month that certain retained employees are not employed by us due to resignation without good reason, or termination for cause, both as defined in the agreement. The portion of this payment that will be paid to retained employees and that is contingent on their continuing employment, approximately $0.9 million, will be accounted for as post-combination compensation expense rather than purchase consideration. There are also two potential earn-outs under the agreement. The first earn-out is calculated at 50% of the amount by which net revenue in the first 12 months following the closing exceeds $6 million, with such payout not to exceed $2 million. The second earn-out is calculated at 50% of the amount by which net revenue in the second 12 months following the closing exceeds $9 million, with such payout not to exceed $2 million  
Maximum goodwill deductible for tax purposes   15 years  
Weighted average useful life   10 years 3 months 18 days  
Restore Flow Allografts [Member] | Maximum [Member]      
Business Acquisition [Line Items]      
Acquisition-related contingent consideration 6,000,000    
Contingency One [Member] | Restore Flow Allografts [Member]      
Business Acquisition [Line Items]      
Acquisition-related contingent consideration 2,000,000    
Earn - Outs Payment One [Member] | Restore Flow Allografts [Member] | Maximum [Member]      
Business Acquisition [Line Items]      
Acquisition-related contingent consideration 2,000,000    
Earn - Outs Payment One [Member] | Restore Flow Allografts [Member] | Minimum [Member]      
Business Acquisition [Line Items]      
Net revenue 6,000,000    
Earn - Outs Payment Two [Member] | Restore Flow Allografts [Member] | Maximum [Member]      
Business Acquisition [Line Items]      
Acquisition-related contingent consideration 2,000,000    
Earn - Outs Payment Two [Member] | Restore Flow Allografts [Member] | Minimum [Member]      
Business Acquisition [Line Items]      
Net revenue $ 9,000,000