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Business and Product Line Acquisitions - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended
Dec. 27, 2016
Dec. 01, 2016
May 01, 2016
Apr. 26, 2016
Dec. 22, 2015
Aug. 26, 2015
Jun. 01, 2015
Dec. 08, 2014
Oct. 01, 2014
Jul. 31, 2016
Beijing Anapure BioScientific Co., Ltd.                    
Business Acquisition [Line Items]                    
Cash consideration for purchase of business               $ 2,040    
Purchase price allocation for inventory               525    
Purchase price allocation for land, property and equipment               64    
Purchase price allocation for intangible assets               $ 422    
Beijing Anapure BioScientific Co., Ltd. | Minimum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life               5 years    
Beijing Anapure BioScientific Co., Ltd. | Maximum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life               15 years    
Sterling Test House                    
Business Acquisition [Line Items]                    
Cash consideration for purchase of business             $ 1,118      
Purchase price allocation for accounts receivable             43      
Purchase price allocation for inventory             14      
Purchase price allocation for land, property and equipment             141      
Purchase price allocation for intangible assets             345      
Contingent consideration potential payment             102      
Allocation of purchase price for contingent consideration potential payment             $ 102      
Cash paid for contingent consideration                   $ 70
Sterling Test House | Minimum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life             5 years      
Sterling Test House | Maximum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life             15 years      
Lab M Holdings                    
Business Acquisition [Line Items]                    
Cash consideration for purchase of business           $ 12,436        
Purchase price allocation for accounts receivable           975        
Purchase price allocation for inventory           1,169        
Purchase price allocation for land, property and equipment           3,337        
Purchase price allocation for current liabilities           948        
Purchase price allocation for intangible assets           3,611        
Purchase price allocation for cash           285        
Purchase price allocation for other current assets           309        
Purchase price allocation for deferred tax liability           $ 784        
Lab M Holdings | Minimum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life           5 years        
Lab M Holdings | Maximum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life           15 years        
BioLumix, Inc.                    
Business Acquisition [Line Items]                    
Cash consideration for purchase of business                 $ 4,514  
Purchase price allocation for accounts receivable                 499  
Purchase price allocation for other receivable                 178  
Purchase price allocation for inventory                 421  
Purchase price allocation for prepaid assets                 48  
Purchase price allocation for land, property and equipment                 159  
Purchase price allocation for current liabilities                 155  
Purchase price allocation for long-term liabilities                 780  
Purchase price allocation for intangible assets                 $ 2,090  
BioLumix, Inc. | Minimum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life                 5 years  
BioLumix, Inc. | Maximum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life                 15 years  
Virbac Corporation                    
Business Acquisition [Line Items]                    
Cash consideration for purchase of business         $ 3,525          
Purchase price allocation for inventory         317          
Purchase price allocation for land, property and equipment         60          
Purchase price allocation for intangible assets         2,545          
Contingent consideration potential payment         $ 300          
Virbac Corporation | Minimum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life         5 years          
Virbac Corporation | Maximum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life         15 years          
Deoxi Biotecnologia Ltd                    
Business Acquisition [Line Items]                    
Cash consideration for purchase of business       $ 1,549            
Purchase price allocation for accounts receivable       132            
Purchase price allocation for inventory       89            
Purchase price allocation for land, property and equipment       232            
Purchase price allocation for current liabilities       266            
Purchase price allocation for intangible assets       350            
Contingent consideration potential payment       2,552            
Allocation of purchase price for contingent consideration potential payment       453            
Purchase price allocation for other current assets       $ 9            
Deoxi Biotecnologia Ltd | Minimum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life       5 years            
Deoxi Biotecnologia Ltd | Maximum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life       10 years            
Tetradyne LLC                    
Business Acquisition [Line Items]                    
Cash consideration for purchase of business     $ 24,086              
Purchase price allocation for accounts receivable     1,629              
Purchase price allocation for inventory     1,964              
Purchase price allocation for land, property and equipment     1,625              
Purchase price allocation for current liabilities     868              
Purchase price allocation for long-term liabilities     660              
Purchase price allocation for intangible assets     10,590              
Purchase price allocation for other current assets     $ 269              
Tetradyne LLC | Minimum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life     5 years              
Tetradyne LLC | Maximum                    
Business Acquisition [Line Items]                    
Finite lived intangible assets, useful life     15 years              
Subsequent Event | Quat-Chem Ltd.                    
Business Acquisition [Line Items]                    
Cash consideration for purchase of business   $ 20,500                
Subsequent Event | Rogama Industria e Comercio, Ltda.                    
Business Acquisition [Line Items]                    
Cash consideration for purchase of business $ 13,000                  
Trademarks | Deoxi Biotecnologia Ltd                    
Business Acquisition [Line Items]                    
Purchase price allocation for non-amortizable trademarks       $ 193