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Segments and Geographic Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
May 31, 2016 | Feb. 29, 2016 | Nov. 30, 2015 | Aug. 31, 2015 | May 31, 2015 | Feb. 28, 2015 | Nov. 30, 2014 | Aug. 31, 2014 | Nov. 30, 2015 | Nov. 30, 2014 | Feb. 29, 2016 | Feb. 28, 2015 | May 31, 2016 | May 31, 2015 | May 31, 2014
Summary of total net sales by product category |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 93,419 | $ 87,434 | $ 89,284 | $ 83,753 | $ 90,697 | $ 86,597 | $ 92,149 | $ 87,091 | $ 173,037 | $ 179,240 | $ 260,471 | $ 265,837 | $ 353,890 | $ 356,534 | $ 354,425
Peripheral Vascular |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of total net sales by product category |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 202,780 | 192,713 | 192,626
Vascular Access |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of total net sales by product category |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 99,375 | 107,754 | 106,394
Oncology/Surgery |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of total net sales by product category |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 48,895 | 51,890 | 49,360
Supply Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Summary of total net sales by product category |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,840 | $ 4,177 | $ 6,045

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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