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Segment and Geographic Information (Tables) | 6 Months Ended
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Nov. 30, 2015
Segment Reporting [Abstract] |
Summary of Net Sales by Product Category | The table below summarizes net sales by product category (in thousands of dollars):
| Three Months Ended |  | Six Months Ended
| Nov 30, 2015 |  | Nov 30, 2014 |  | Nov 30, 2015 |  | Nov 30, 2014
Net sales |  |  |  |  |  |  |
Peripheral Vascular | $ | 51,051 |  |  | $ | 49,440 |  |  | $ | 98,158 |  |  | $ | 96,801 |
Vascular Access | 25,023 |  |  | 27,968 |  |  | 49,667 |  |  | 54,393 |
Oncology/Surgery | 12,422 |  |  | 13,634 |  |  | 23,706 |  |  | 25,996 |
Supply Agreement | 738 |  |  | 1,107 |  |  | 1,406 |  |  | 2,290 |
Total | $ | 89,234 |  |  | $ | 92,149 |  |  | $ | 172,937 |  |  | $ | 179,480 |
Summary of Net Sales by Geographic Area | The table below presents net sales by geographic area based on external customer location (in thousands of dollars):
| Three Months Ended |  | Six Months Ended
| Nov 30, 2015 |  | Nov 30, 2014 |  | Nov 30, 2015 |  | Nov 30, 2014
Net sales |  |  |  |  |  |  |
United States | $ | 70,651 |  |  | $ | 72,058 |  |  | $ | 139,021 |  |  | $ | 140,438 |
International | 17,845 |  |  | 18,984 |  |  | 32,510 |  |  | 36,752 |
Supply Agreement | 738 |  |  | 1,107 |  |  | 1,406 |  |  | 2,290 |
Total | $ | 89,234 |  |  | $ | 92,149 |  |  | $ | 172,937 |  |  | $ | 179,480 |

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- Definition Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. + 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=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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