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Segment and Geographic Information - Summary of Net Sales by Product Category (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2015	Nov. 30, 2014	Nov. 30, 2015	Nov. 30, 2014
Segment Reporting Information [Line Items]
Net sales	$ 89,234	$ 92,149	$ 172,937	$ 179,480
Peripheral Vascular [Member]
Segment Reporting Information [Line Items]
Net sales	51,051	49,440	98,158	96,801
Vascular Access [Member]
Segment Reporting Information [Line Items]
Net sales	25,023	27,968	49,667	54,393
Oncology/Surgery [Member]
Segment Reporting Information [Line Items]
Net sales	12,422	13,634	23,706	25,996
Supply Agreement [Member]
Segment Reporting Information [Line Items]
Net sales	$ 738	$ 1,107	$ 1,406	$ 2,290

X

- 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=26872669&loc=d3e20235-122688

Reference 2: 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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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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