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Business Combinations - Additional Information (Detail) (USD $) | 12 Months Ended | 0 Months Ended |  | 0 Months Ended | 1 Months Ended |  | 0 Months Ended |  | 0 Months Ended |  | 0 Months Ended |  | 0 Months Ended |  | 0 Months Ended |  |  | 0 Months Ended |
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May 31, 2014 Minimum | May 31, 2014 Maximum | Jul. 01, 2013 SyrVet, Inc. | Jul. 01, 2013 SyrVet, Inc. | Jul. 01, 2013 SyrVet, Inc. Trademarks | Oct. 01, 2012 Macleod Pharmaceuticals | Oct. 31, 2013 Macleod Pharmaceuticals | Oct. 01, 2012 Macleod Pharmaceuticals | Jan. 02, 2013 Scidera Genomics, LLC | Jan. 02, 2013 Scidera Genomics, LLC | Nov. 01, 2013 Prima Tech Incorporated | Nov. 01, 2013 Prima Tech Incorporated | Nov. 01, 2013 Prima Tech Incorporated Minimum | Nov. 01, 2013 Prima Tech Incorporated Maximum | Nov. 01, 2013 Prima Tech Incorporated Trademarks | Jan. 02, 2014 Chem Tech Ltd | Jan. 02, 2014 Chem Tech Ltd | Jan. 02, 2014 Chem Tech Ltd Trademarks | May 01, 2012 Merial Limited. | May 31, 2013 Merial Limited. | May 01, 2012 Merial Limited. | Jun. 21, 2011 VeroMara | Jun. 21, 2011 VeroMara
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration for purchase of business |  |  | $ 10,012,000 |  |  | $ 9,918,000 |  |  | $ 3,400,000 |  | $ 12,068,000 |  |  |  |  | $ 17,185,000 |  |  | $ 3,200,000 |  |  | $ 813,000 |
Contingent consideration potential payment |  |  |  | 1,500,000 |  |  |  | 100,000 |  |  |  | 600,000 |  |  |  |  | 1,000,000 |  |  |  |  |  | 200,000
Purchase price allocation for current assets |  |  |  |  |  |  |  |  |  | 35,000 |  |  |  |  |  |  |  |  |  |  | 110,000 |  |
Purchase price allocation for property and equipment |  |  |  | 556,000 |  |  |  | 300,000 |  | 246,000 |  | 1,653,000 |  |  |  |  | 682,000 |  |  |  | 340,000 |  |
Allocation of purchase price for contingent consideration potential payment |  |  |  | 930,000 |  |  |  | 100,000 |  |  |  | 146,000 |  |  |  |  | 400,000 |  |  |  | 600,000 |  |
Purchase price allocation for intangible assets |  |  |  | 4,810,000 |  |  |  | 5,542,000 |  | 1,570,000 |  | 4,400,000 |  |  |  |  | 7,536,000 |  |  |  | 2,036,000 |  |
Cash paid for data |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000 |  |
Reversed the remaining contingent consideration accrual to other income |  |  |  |  |  |  | 38,000 |  |  |  |  |  |  |  |  |  |  |  |  | 100,000 |  |  |
Purchase price allocation for accounts receivable |  |  |  | 747,000 |  |  |  | 353,000 |  |  |  | 963,000 |  |  |  |  | 380,000 |  |  |  |  |  |
Purchase price allocation for inventory |  |  |  | 2,195,000 |  |  |  | 1,238,000 |  |  |  | 2,796,000 |  |  |  |  | 4,096,000 |  |  |  |  |  |
Purchase price allocation for current liabilities |  |  |  | 226,000 |  |  |  | 82,000 |  |  |  | 1,840,000 |  |  |  |  | 184,000 |  |  |  |  |  |
Purchase price allocation for deferred tax liabilities, current |  |  |  |  |  |  |  | 2,054,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash paid for contingent consideration |  |  |  |  |  |  | 62,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation for non-amortizable trademarks |  |  |  |  | 790,000 |  |  |  |  |  |  |  |  |  | 1,500,000 |  |  | 662,000 |  |  |  |  |
Finite lived intangible assets, useful life | 5 years | 20 years | 15 years |  |  |  |  |  |  |  |  |  | 5 years | 15 years |  | 15 years |  |  |  |  |  |  |
Purchase price allocation for prepaid assets |  |  |  |  |  |  |  |  |  |  |  | $ 8,000 |  |  |  |  | $ 225,000 |  |  |  |  |  |

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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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