Percentage of total trade joint venture receivables accounted for by three joint ventures.

No definition available.

Name:	ntic_EntityWideTradeJointVentureReceivablesThreeJointVenturesPercentage
Namespace Prefix:	ntic_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of total trade joint venture receivables accounted for by two joint ventures.

+ References

No definition available.

+ Details

Name:	ntic_EntityWideTradeJointVentureReceivablesTwoJointVenturesPercentage
Namespace Prefix:	ntic_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	ntic_Note13CommitmentsandContingenciesDetailsLineItems
Namespace Prefix:	ntic_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of individual's bonus payout determined based upon the Company's actual EBITOI for the fiscal year compared to pre-established target EBITOI for the fiscal year.

+ References

No definition available.

+ Details

Name:	ntic_PercentageOfIndividualBonusPayoutDeterminedByActualVersusTargetedEBITOIResults
Namespace Prefix:	ntic_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of individual's payout determined based upon achievement of certain pre-established individual performance objectives.

+ References

No definition available.

+ Details

Name:	ntic_PercentageOfIndividualsPayoutDeterminedUponAchievementOfCertainPreEstablishedIndividualPerformanceObjectives
Namespace Prefix:	ntic_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable for incentive compensation awarded to employees and directors or earned by them based on the terms of one or more relevant arrangements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.15(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph a

-Article 7

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph 5

-Article 9

+ Details

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

- Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis=ntic_Fiscal2013BonusPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 13 - Commitments and Contingencies (Details) (USD $)	3 Months Ended
	Nov. 30, 2014	Aug. 31, 2014	Nov. 30, 2013
Note 13 - Commitments and Contingencies (Details) [Line Items]
Accrued Bonuses (in Dollars)	240,000		$ 299,000
Entity-Wide Trade Joint Venture Receivables, Two Joint Ventures, Percentage	47.70%
Entity-Wide Trade Joint Venture Receivables, Three Joint Ventures, Percentage		62.90%
Fiscal 2013 Bonus Plan [Member] \| Executive Officer [Member]
Note 13 - Commitments and Contingencies (Details) [Line Items]
Percentage of Individual Bonus Payout Determined By Actual Versus Targeted EBITOI Results	75.00%
Percentage of Individual's Payout Determined Upon Achievement of Certain Pre-Established Individual Performance Objectives	25.00%