Business Acquisition Cost of Acquired Entity, Liabilities Reversed

No definition available.

Name:	neog_BusinessAcquisitionCostOfAcquiredEntityLiabilitiesReversed
Namespace Prefix:	neog_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Business Combination Acquisition Fees Paid In Cash

+ References

No definition available.

+ Details

Name:	neog_BusinessCombinationAcquisitionFeesPaidInCash
Namespace Prefix:	neog_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Payment For Business Acquisition Contingent Consideration

+ References

No definition available.

+ Details

Name:	neog_PaymentForBusinessAcquisitionContingentConsideration
Namespace Prefix:	neog_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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

- Definition

For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479

+ Details

Name:	us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of liability arising from an inherited contingency (as defined) which has been recognized as of the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 55

-Paragraph 37

-URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContingentLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

+ References

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

+ References

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

+ References

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

+ References

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of deferred tax liability attributable to taxable temporary differences due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

+ References

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit, acquired at the acquisition date.

+ References

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

+ References

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of inventory recognized as of the acquisition date.

+ References

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of property, plant, and equipment recognized as of the acquisition date.

+ References

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

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

Business Combinations - Additional Information (Detail) (USD $)	12 Months Ended		0 Months Ended			0 Months Ended	1 Months Ended		0 Months Ended		0 Months Ended		0 Months Ended			0 Months Ended			0 Months Ended			0 Months Ended
	May 31, 2014 Minimum	May 31, 2014 Maximum	Jul. 01, 2013 SyrVet, Inc.	Jul. 01, 2013 SyrVet, Inc.	Jul. 01, 2013 SyrVet, Inc. Trademarks	Oct. 01, 2012 Macleod Pharmaceuticals	Oct. 31, 2013 Macleod Pharmaceuticals	Oct. 01, 2012 Macleod Pharmaceuticals	Jan. 02, 2013 Scidera Genomics, LLC	Jan. 02, 2013 Scidera Genomics, LLC	Nov. 01, 2013 Prima Tech Incorporated	Nov. 01, 2013 Prima Tech Incorporated	Nov. 01, 2013 Prima Tech Incorporated Minimum	Nov. 01, 2013 Prima Tech Incorporated Maximum	Nov. 01, 2013 Prima Tech Incorporated Trademarks	Jan. 02, 2014 Chem Tech Ltd	Jan. 02, 2014 Chem Tech Ltd	Jan. 02, 2014 Chem Tech Ltd Trademarks	May 01, 2012 Merial Limited.	May 31, 2013 Merial Limited.	May 01, 2012 Merial Limited.	Jun. 21, 2011 VeroMara	Jun. 21, 2011 VeroMara
Business Acquisition [Line Items]
Cash consideration for purchase of business			$ 10,012,000			$ 9,918,000			$ 3,400,000		$ 12,068,000					$ 17,185,000			$ 3,200,000			$ 813,000
Contingent consideration potential payment				1,500,000				100,000				600,000					1,000,000						200,000
Purchase price allocation for current assets										35,000											110,000
Purchase price allocation for property and equipment				556,000				300,000		246,000		1,653,000					682,000				340,000
Allocation of purchase price for contingent consideration potential payment				930,000				100,000				146,000					400,000				600,000
Purchase price allocation for intangible assets				4,810,000				5,542,000		1,570,000		4,400,000					7,536,000				2,036,000
Cash paid for data																					500,000
Reversed the remaining contingent consideration accrual to other income							38,000													100,000
Purchase price allocation for accounts receivable				747,000				353,000				963,000					380,000
Purchase price allocation for inventory				2,195,000				1,238,000				2,796,000					4,096,000
Purchase price allocation for current liabilities				226,000				82,000				1,840,000					184,000
Purchase price allocation for deferred tax liabilities, current								2,054,000
Cash paid for contingent consideration							62,000
Purchase price allocation for non-amortizable trademarks					790,000										1,500,000			662,000
Finite lived intangible assets, useful life	5 years	20 years	15 years										5 years	15 years		15 years
Purchase price allocation for prepaid assets												$ 8,000					$ 225,000