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Business Combinations - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 12 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
Jun. 30, 2017
Jul. 31, 2016
May 31, 2017
May 31, 2016
May 31, 2015
May 31, 2019
Business Acquisition [Line Items]                              
Reverse the remaining contingent consideration accrual to other income                       $ 18   $ (297)  
Minimum                              
Business Acquisition [Line Items]                              
Finite lived intangible assets, useful life                       5 years      
Maximum                              
Business Acquisition [Line Items]                              
Finite lived intangible assets, useful life                       25 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            
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                  
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 current liabilities         300                    
Purchase price allocation for intangible assets         1,759                    
Contingent consideration potential payment         $ 300                    
Purchase price allocation for contingent consideration                         $ 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                      
Purchase price allocation for deferred tax liability       $ 184                      
Deoxi Biotecnologia Ltd | During fiscal 2017                              
Business Acquisition [Line Items]                              
Allocation of purchase price for contingent consideration potential payment                             $ 60
Deoxi Biotecnologia Ltd | Subsequent Event                              
Business Acquisition [Line Items]                              
Contingent consideration potential payment                   $ 393          
Reverse the remaining contingent consideration accrual to other income                   $ 14          
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     $ 24,245                        
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     987                        
Purchase price allocation for long-term liabilities     660                        
Purchase price allocation for intangible assets     11,950                        
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                        
Quat-Chem Ltd.                              
Business Acquisition [Line Items]                              
Cash consideration for purchase of business   $ 21,606                          
Purchase price allocation for accounts receivable   4,684                          
Purchase price allocation for inventory   1,243                          
Purchase price allocation for land, property and equipment   2,715                          
Purchase price allocation for intangible assets   5,682                          
Contingent consideration potential payment   3,778                          
Allocation of purchase price for contingent consideration potential payment   1,105                          
Purchase price allocation for non-amortizable intangible assets   1,637                          
Purchase price allocation for accounts payable   2,197                          
Purchase price allocation for deferred tax liability   1,133                          
Purchase price allocation for other current liabilities   $ 604                          
Quat-Chem Ltd. | Minimum                              
Business Acquisition [Line Items]                              
Finite lived intangible assets, useful life   5 years                          
Quat-Chem Ltd. | Maximum                              
Business Acquisition [Line Items]                              
Finite lived intangible assets, useful life   15 years                          
Rogama Industria e Comercio, Ltda.                              
Business Acquisition [Line Items]                              
Cash consideration for purchase of business $ 12,423                            
Purchase price allocation for accounts receivable 1,863                            
Purchase price allocation for inventory 1,026                            
Purchase price allocation for land, property and equipment 1,840                            
Purchase price allocation for current liabilities 2,177                            
Purchase price allocation for intangible assets 3,252                            
Contingent consideration potential payment 2,069                            
Allocation of purchase price for contingent consideration potential payment 430                            
Purchase price allocation for deferred tax liability 1,307                            
Purchase price allocation for non-amortizable intangible assets $ 591                            
Rogama Industria e Comercio, Ltda. | Minimum                              
Business Acquisition [Line Items]                              
Finite lived intangible assets, useful life 5 years                            
Rogama Industria e Comercio, Ltda. | Maximum                              
Business Acquisition [Line Items]                              
Finite lived intangible assets, useful life 15 years                            
Trademarks | Virbac Corporation                              
Business Acquisition [Line Items]                              
Purchase price allocation for non-amortizable intangible assets         $ 200                    
Trademarks | Deoxi Biotecnologia Ltd                              
Business Acquisition [Line Items]                              
Purchase price allocation for non-amortizable intangible assets       $ 193                      
Trademarks | Tetradyne LLC                              
Business Acquisition [Line Items]                              
Purchase price allocation for non-amortizable intangible assets     $ 2,600