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Business Combinations - Additional Information (Detail) - USD ($) $ in Thousands |  |  |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |
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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 |  |  |  |  |  |  |  |  |  |  |  |

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