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Business Combinations - Summary of Purchase Price Allocation to the Fair Values Assigned to the Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
9 Months Ended
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Business Acquisition [Line Items]        
Goodwill $ 26,544     $ 8,010
Developed Technology [Member]        
Business Acquisition [Line Items]        
Estimated Useful Life (In years) 11 years 9 months 18 days      
Creagh Medical Ltd [Member]        
Business Acquisition [Line Items]        
Current assets $ 708      
Property and equipment 634      
Other noncurrent assets 81      
Current liabilities (923)      
Deferred tax liabilities (9)      
Net assets acquired 14,414      
Goodwill 13,609   $ 13,600  
Total purchase price, net of cash acquired $ 28,023      
Creagh Medical Ltd [Member] | Minimum [Member]        
Business Acquisition [Line Items]        
Estimated Useful Life (In years) 1 year      
Creagh Medical Ltd [Member] | Maximum [Member]        
Business Acquisition [Line Items]        
Estimated Useful Life (In years) 10 years      
Creagh Medical Ltd [Member] | Developed Technology [Member]        
Business Acquisition [Line Items]        
Intangible assets $ 1,787      
Estimated Useful Life (In years) 7 years      
Creagh Medical Ltd [Member] | In-Process Research and Development [Member]        
Business Acquisition [Line Items]        
Intangible assets $ 942      
Creagh Medical Ltd [Member] | Customer Relationship [Member]        
Business Acquisition [Line Items]        
Intangible assets $ 11,119      
Creagh Medical Ltd [Member] | Customer Relationship [Member] | Minimum [Member]        
Business Acquisition [Line Items]        
Estimated Useful Life (In years) 7 years      
Creagh Medical Ltd [Member] | Customer Relationship [Member] | Maximum [Member]        
Business Acquisition [Line Items]        
Estimated Useful Life (In years) 10 years      
Creagh Medical Ltd [Member] | Trade Name [Member]        
Business Acquisition [Line Items]        
Intangible assets $ 75      
NorMedix, Inc. [Member]        
Business Acquisition [Line Items]        
Current assets 196      
Property and equipment 76      
Deferred tax asset 812      
Other noncurrent assets 12      
Deferred tax liabilities (2,597)      
Net assets acquired 6,249      
Goodwill 4,379 $ 4,400    
Total purchase price, net of cash acquired 10,628      
NorMedix, Inc. [Member] | Developed Technology [Member]        
Business Acquisition [Line Items]        
Intangible assets $ 6,850      
NorMedix, Inc. [Member] | Developed Technology [Member] | Minimum [Member]        
Business Acquisition [Line Items]        
Estimated Useful Life (In years) 10 years      
NorMedix, Inc. [Member] | Developed Technology [Member] | Maximum [Member]        
Business Acquisition [Line Items]        
Estimated Useful Life (In years) 14 years      
NorMedix, Inc. [Member] | Customer Relationship [Member]        
Business Acquisition [Line Items]        
Intangible assets $ 900      
Estimated Useful Life (In years) 4 years