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Business and Product Line Acquisitions - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Dec. 22, 2015
Aug. 26, 2015
Jun. 01, 2015
Dec. 08, 2014
Oct. 01, 2014
Jan. 02, 2014
Nov. 01, 2013
Jul. 01, 2013
Feb. 28, 2015
Oct. 31, 2014
Aug. 31, 2014
Feb. 29, 2016
Feb. 28, 2015
Feb. 29, 2016
Feb. 28, 2015
Business Acquisition [Line Items]                              
Reversed the remaining contingent consideration accrual to other income                       $ 0 $ (84,000) $ 0 $ (297,000)
Beijing Anapure BioScientific Co., Ltd.                              
Business Acquisition [Line Items]                              
Cash consideration for purchase of business       $ 2,040,000                      
Purchase price allocation for inventory       525,000                      
Purchase price allocation for property and equipment       64,000                      
Purchase price allocation for intangible assets       $ 422,000                      
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     $ 1,118,000                        
Contingent consideration potential payment     150,000                        
Purchase price allocation for accounts receivable     43,000                        
Purchase price allocation for inventory     14,000                        
Purchase price allocation for property and equipment     $ 141,000                        
Lab M Holdings                              
Business Acquisition [Line Items]                              
Cash consideration for purchase of business   $ 12,436,000                          
Purchase price allocation for accounts receivable   975,000                          
Purchase price allocation for inventory   1,169,000                          
Purchase price allocation for property and equipment   3,337,000                          
Purchase price allocation for current liabilities   1,350,000                          
Purchase price allocation for intangible assets   3,918,000                          
Purchase price allocation for cash   285,000                          
Purchase price allocation for other current assets   596,000                          
Purchase price allocation for deferred tax liability   $ 784,000                          
Lab M Holdings | Minimum                              
Business Acquisition [Line Items]                              
Finite lived intangible assets, useful life   3 years                          
Lab M Holdings | Maximum                              
Business Acquisition [Line Items]                              
Finite lived intangible assets, useful life   15 years                          
SyrVet, Inc.                              
Business Acquisition [Line Items]                              
Cash consideration for purchase of business               $ 10,012,000              
Contingent consideration potential payment               1,500,000              
Purchase price allocation for accounts receivable               747,000              
Purchase price allocation for inventory               2,195,000              
Purchase price allocation for property and equipment               556,000              
Purchase price allocation for current liabilities               226,000              
Allocation of purchase price for contingent consideration potential payment               930,000              
Purchase price allocation for intangible assets               $ 4,810,000              
Finite lived intangible assets, useful life               15 years              
Cash paid for contingent consideration                     $ 689,000        
Reversed the remaining contingent consideration accrual to other income                     $ 241,000        
SyrVet, Inc. | Trademarks                              
Business Acquisition [Line Items]                              
Purchase price allocation for non-amortizable trademarks               $ 790,000              
Prima Tech Incorporated                              
Business Acquisition [Line Items]                              
Cash consideration for purchase of business             $ 12,068,000                
Contingent consideration potential payment             600,000                
Purchase price allocation for accounts receivable             963,000                
Purchase price allocation for inventory             2,796,000                
Purchase price allocation for property and equipment             1,653,000                
Purchase price allocation for current liabilities             1,840,000                
Allocation of purchase price for contingent consideration potential payment             146,000                
Purchase price allocation for intangible assets             4,400,000                
Cash paid for contingent consideration                   $ 600,000          
Purchase price allocation for prepaid assets             $ 8,000                
Cash accrued for contingent consideration                   $ 454,000          
Prima Tech Incorporated | Minimum                              
Business Acquisition [Line Items]                              
Finite lived intangible assets, useful life             5 years                
Prima Tech Incorporated | Maximum                              
Business Acquisition [Line Items]                              
Finite lived intangible assets, useful life             15 years                
Prima Tech Incorporated | Trademarks                              
Business Acquisition [Line Items]                              
Purchase price allocation for non-amortizable trademarks             $ 1,500,000                
Chem Tech Ltd                              
Business Acquisition [Line Items]                              
Cash consideration for purchase of business           $ 17,185,000                  
Contingent consideration potential payment           1,000,000                  
Purchase price allocation for accounts receivable           380,000                  
Purchase price allocation for inventory           4,184,000                  
Purchase price allocation for property and equipment           807,000                  
Purchase price allocation for current liabilities           184,000                  
Allocation of purchase price for contingent consideration potential payment           390,000                  
Purchase price allocation for intangible assets           8,327,000                  
Cash paid for contingent consideration                 $ 474,000            
Purchase price allocation for prepaid assets           $ 100,000                  
Cash accrued for contingent consideration                 $ 84,000            
Chem Tech Ltd | Minimum                              
Business Acquisition [Line Items]                              
Finite lived intangible assets, useful life           5 years                  
Chem Tech Ltd | 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         $ 4,514,000                    
Purchase price allocation for accounts receivable         499,000                    
Purchase price allocation for inventory         421,000                    
Purchase price allocation for property and equipment         159,000                    
Purchase price allocation for current liabilities         155,000                    
Purchase price allocation for intangible assets         2,090,000                    
Purchase price allocation for prepaid assets         48,000                    
Purchase price allocation for other receivable         178,000                    
Purchase price allocation for long-term liabilities         $ 780,000                    
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 $ 3,525,000                            
Contingent consideration potential payment 300,000                            
Purchase price allocation for inventory 317,000                            
Purchase price allocation for property and equipment 60,000                            
Purchase price allocation for intangible assets $ 2,545,000                            
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