XML 28 R48.htm IDEA: XBRL DOCUMENT v2.4.0.8

Segment Information - Additional Information (Detail) (USD $)	3 Months Ended								12 Months Ended
	May 31, 2013	Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2012	Feb. 29, 2012	Nov. 30, 2011	Aug. 31, 2011	May 31, 2013 Segment	May 31, 2012	May 31, 2011
Segment Reporting Information [Line Items]
Number of reportable segments									2
Net Sales	$ 56,007,000	$ 51,055,000	$ 50,737,000	$ 49,729,000	$ 48,546,000	$ 44,912,000	$ 44,891,000	$ 45,697,000	$ 207,528,000	$ 184,046,000	$ 172,683,000
Foreign Operations
Segment Reporting Information [Line Items]
Net Sales									$ 83,171,000	$ 76,672,000	$ 72,724,000
Net Sales, percentage									40.10%	41.70%	42.10%
United States
Segment Reporting Information [Line Items]
Long lived assets percentage	95.00%				96.00%				95.00%	96.00%

X

- Definition

Long Lived Assets Percentage

+ References

No definition available.

+ Details

Name:	neog_LongLivedAssetsPercentage
Namespace Prefix:	neog_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Sales Revenue Goods Net Percentages

+ References

No definition available.

+ Details

Name:	neog_SalesRevenueGoodsNetPercentages
Namespace Prefix:	neog_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration