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Summary of Significant Accounting Policies (Details) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Animal Health International, Inc. [Member] |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |
Concentration risk percentage | [1] | 42.00% |  | 42.00% | 39.00% |  | 42.00% |
MWI Animal Health [Member] |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |
Concentration risk percentage | [2] | 20.00% |  | 13.00% | 20.00% |  | 21.00% |
Robert J. Matthews Company [Member] |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |
Concentration risk percentage |  |  | [3] | 11.00% |  | [3] |  | [3]
[1] | During June 2015, Patterson Companies, Inc. (NASDAQ: PDCO) acquired Animal Health International, Inc.
[2] | During March 2015, AmerisourceBergen Corporation (NYSE: ABC) acquired MWI Animal Health.
[3] | Amount is less than 10%.

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