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Acquisitions - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Aug. 01, 2019
Jun. 14, 2019
Mar. 28, 2019
Dec. 14, 2018
Nov. 13, 2018
May 23, 2018
Feb. 14, 2018
Sep. 30, 2019
Sep. 30, 2019
Dec. 31, 2018
Fluidx                    
Business Acquisition [Line Items]                    
Payments to acquire shares     $ 2,000,000              
Ownership percentage               12.70% 12.70%  
Fibrovein Holdings Limited                    
Business Acquisition [Line Items]                    
Purchase consideration, upfront payment $ 13,700,000                  
Weighted average useful life 12 years                  
Fibrovein Holdings Limited | STD Pharmaceutical Products Limited                    
Business Acquisition [Line Items]                    
Ownership percentage 100.00%                  
Brightwater                    
Business Acquisition [Line Items]                    
Purchase consideration, upfront payment   $ 35,000,000                
Working capital adjustment   $ 104,000                
Weighted average useful life   12 years 10 months 24 days                
Brightwater | Achievement of CE Certification                    
Business Acquisition [Line Items]                    
Earn-out payments   $ 5,000,000                
Brightwater | Achievement of Sales Milestones                    
Business Acquisition [Line Items]                    
Earn-out payments   $ 10,000,000                
Brightwater | Developed technology                    
Business Acquisition [Line Items]                    
Useful life   13 years                
Brightwater | Trademarks                    
Business Acquisition [Line Items]                    
Useful life   5 years                
Brightwater | Customer Lists                    
Business Acquisition [Line Items]                    
Useful life   1 year                
Vascular Insights                    
Business Acquisition [Line Items]                    
Purchase consideration, upfront payment       $ 40,000,000            
Working capital adjustment               $ 15,000    
Weighted average useful life       11 years 9 months 18 days            
Contingent liability       $ 20,000,000            
Net sales related to acquisition               2,000,000.0 $ 5,200,000  
Vascular Insights | Developed technology                    
Business Acquisition [Line Items]                    
Useful life       12 years            
Vascular Insights | Trademarks                    
Business Acquisition [Line Items]                    
Useful life       9 years            
Vascular Insights | Customer Lists                    
Business Acquisition [Line Items]                    
Useful life       8 years            
Cianna Medical                    
Business Acquisition [Line Items]                    
Purchase consideration, upfront payment         $ 135,000,000          
Working capital adjustment         $ 1,200,000          
Weighted average useful life         10 years 8 months 12 days          
Net sales related to acquisition               11,600,000 35,700,000  
Acquisition-related costs                   $ 3,500,000
Cianna Medical | Achievement of Supply Chain and Scalability Metrics                    
Business Acquisition [Line Items]                    
Earn-out payments         $ 15,000,000          
Cianna Medical | Annual Net Sales Milestone                    
Business Acquisition [Line Items]                    
Earn-out payments         $ 50,000,000          
Cianna Medical | Developed technology                    
Business Acquisition [Line Items]                    
Useful life         11 years          
Cianna Medical | Trademarks                    
Business Acquisition [Line Items]                    
Useful life         10 years          
Cianna Medical | Customer Lists                    
Business Acquisition [Line Items]                    
Useful life         8 years          
DirectACCESS Medical, LLC                    
Business Acquisition [Line Items]                    
Weighted average useful life           9 years 10 months 24 days        
Total purchase price           $ 7,300,000        
DirectACCESS Medical, LLC | Developed technology                    
Business Acquisition [Line Items]                    
Useful life           10 years        
DirectACCESS Medical, LLC | Trademarks                    
Business Acquisition [Line Items]                    
Useful life           10 years        
DirectACCESS Medical, LLC | Customer Lists                    
Business Acquisition [Line Items]                    
Useful life           5 years        
Becton, Dickinson and Company                    
Business Acquisition [Line Items]                    
Weighted average useful life             8 years      
Contingent liability             $ 1,600,000      
Net sales related to acquisition               $ 12,500,000 $ 35,900,000  
Acquisition-related costs                   $ 1,800,000
Total purchase price             $ 100,300,000      
Becton, Dickinson and Company | Developed technology                    
Business Acquisition [Line Items]                    
Useful life             8 years      
Becton, Dickinson and Company | Trademarks                    
Business Acquisition [Line Items]                    
Useful life             9 years      
Becton, Dickinson and Company | Customer Lists                    
Business Acquisition [Line Items]                    
Useful life             7 years