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Note 11 - Geographic And Segment Information (Details) - Fees For Services Provided to Joint Ventures By Geographic Location as a Percentage of Total Fees for Services Provided to Joint Ventures (USD $) | 3 Months Ended
--- | ---
Nov. 30, 2013 | Nov. 30, 2012
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Fees for Services Provided to Joint Ventures (in Dollars) | $ 2,109,648 |  | $ 1,846,277 |
Percentage of Total Fees for Services Provided to Joint Ventures | 100.00% |  | 100.00% |
China [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Fees for Services Provided to Joint Ventures (in Dollars) | 588,182 | [1] | 493,312 | [1]
Percentage of Total Fees for Services Provided to Joint Ventures | 27.90% | [1] | 26.70% | [1]
Germany [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Fees for Services Provided to Joint Ventures (in Dollars) | 263,555 |  | 242,700 |
Percentage of Total Fees for Services Provided to Joint Ventures | 12.50% |  | 13.10% |
Japan [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Fees for Services Provided to Joint Ventures (in Dollars) | 173,282 |  | 201,981 |
Percentage of Total Fees for Services Provided to Joint Ventures | 8.20% |  | 10.90% |
Poland [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Fees for Services Provided to Joint Ventures (in Dollars) | 164,567 |  | 111,472 |
Percentage of Total Fees for Services Provided to Joint Ventures | 7.80% |  | 6.00% |
Korea [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Fees for Services Provided to Joint Ventures (in Dollars) | 161,424 | [1] | 138,742 | [1]
Percentage of Total Fees for Services Provided to Joint Ventures | 7.70% | [1] | 7.50% | [1]
Thailand [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Fees for Services Provided to Joint Ventures (in Dollars) | 152,558 | [1] | 153,687 | [1]
Percentage of Total Fees for Services Provided to Joint Ventures | 7.20% | [1] | 8.30% | [1]
France [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Fees for Services Provided to Joint Ventures (in Dollars) | 128,103 |  | 128,502 |
Percentage of Total Fees for Services Provided to Joint Ventures | 6.10% |  | 7.00% |
Sweden [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Fees for Services Provided to Joint Ventures (in Dollars) | 109,970 |  | 86,992 |
Percentage of Total Fees for Services Provided to Joint Ventures | 5.20% |  | 4.70% |
Finland [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Fees for Services Provided to Joint Ventures (in Dollars) | 105,202 |  | 87,851 |
Percentage of Total Fees for Services Provided to Joint Ventures | 5.00% |  | 4.80% |
United Kingdom [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Fees for Services Provided to Joint Ventures (in Dollars) | 74,697 |  | 67,058 |
Percentage of Total Fees for Services Provided to Joint Ventures | 3.50% |  | 3.60% |
Other Countries [Member] |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Fees for Services Provided to Joint Ventures (in Dollars) | $ 188,108 |  | $ 133,980 |
Percentage of Total Fees for Services Provided to Joint Ventures | 8.90% |  | 7.40% |
[1] | Joint venture owned by NTI Asean.

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- Definition Percentage of entity wide fees for services provided to joint ventures generated from geographic location. + References No definition available. + Details
Name: | ntic_EntityWideFeesForServicesProvidedToJointVenturesGeographicPercentage
Namespace Prefix: | ntic_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total fees for services provided to joint ventures by geographic locations. + References No definition available. + Details
Name: | ntic_TotalFeesForServicesProvidedToJointVenturesGeographicLocation
Namespace Prefix: | ntic_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_SegmentReportingRevenueReconcilingItemLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration