REVENUES BY PRODUCT CATEGORY AND GEOGRAPHIC REGION AND SIGNIFICANT CONCENTRATIONS, Concentration Risk (Details) - Worldwide Revenues [Member] - Customer Concentration Risk [Member] - Customer	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Concentration Risk [Line Items]
Number of major customers	4	4	4
MWI Veterinary Supply, Inc. [Member]
Concentration Risk [Line Items]
Revenue or accounts receivable by major customer	22.00%	21.00%	20.00%
Henry Schein, Inc. [Member]
Concentration Risk [Line Items]
Revenue or accounts receivable by major customer	16.00%	14.00%	13.00%
Patterson Companies, Inc. [Member]
Concentration Risk [Line Items]
Revenue or accounts receivable by major customer	11.00%	11.00%	11.00%
Abbott Point of Care, Inc. [Member]
Concentration Risk [Line Items]
Revenue or accounts receivable by major customer	10.00%	10.00%	10.00%