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Note 10 - 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 | 6 Months Ended
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Feb. 28, 2014 | Feb. 28, 2014
Three Months Ended [Member] | CHINA |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | $ 523,451 | $ 450,586
Percentage of Total Fees for Services Provided to Joint Ventures | 25.40% | 25.40%
Three Months Ended [Member] | GERMANY |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 263,556 | 249,513
Percentage of Total Fees for Services Provided to Joint Ventures | 12.80% | 14.10%
Three Months Ended [Member] | JAPAN |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 167,410 | 169,205
Percentage of Total Fees for Services Provided to Joint Ventures | 8.20% | 9.60%
Three Months Ended [Member] | INDIA |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 166,858 |
Percentage of Total Fees for Services Provided to Joint Ventures | 8.10% | 0.00%
Three Months Ended [Member] | POLAND |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 152,518 | 154,839
Percentage of Total Fees for Services Provided to Joint Ventures | 7.40% | 8.70%
Three Months Ended [Member] | THAILAND |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 130,441 | 148,303
Percentage of Total Fees for Services Provided to Joint Ventures | 6.30% | 8.40%
Three Months Ended [Member] | FRANCE |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 122,972 | 147,896
Percentage of Total Fees for Services Provided to Joint Ventures | 6.00% | 8.30%
Three Months Ended [Member] | Korea [Member] |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 108,797 | 123,388
Percentage of Total Fees for Services Provided to Joint Ventures | 5.30% | 7.00%
Three Months Ended [Member] | SWEDEN |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 92,223 | 77,627
Percentage of Total Fees for Services Provided to Joint Ventures | 4.50% | 4.40%
Three Months Ended [Member] | UNITED KINGDOM |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 79,935 | 35,754
Percentage of Total Fees for Services Provided to Joint Ventures | 3.90% | 2.00%
Three Months Ended [Member] | FINLAND |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 76,537 | 72,329
Percentage of Total Fees for Services Provided to Joint Ventures | 3.70% | 4.10%
Three Months Ended [Member] | Other Countries [Member] |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 172,973 | 141,441
Percentage of Total Fees for Services Provided to Joint Ventures | 8.40% | 8.00%
Three Months Ended [Member] |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 2,057,671 | 1,770,881
Percentage of Total Fees for Services Provided to Joint Ventures | 100.00% | 100.00%
Six Months Ended [Member] | CHINA |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 1,111,633 | 943,897
Percentage of Total Fees for Services Provided to Joint Ventures | 26.70% | 26.10%
Six Months Ended [Member] | GERMANY |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 527,111 | 492,213
Percentage of Total Fees for Services Provided to Joint Ventures | 12.60% | 13.60%
Six Months Ended [Member] | JAPAN |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 340,691 | 371,186
Percentage of Total Fees for Services Provided to Joint Ventures | 8.20% | 10.30%
Six Months Ended [Member] | INDIA |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 166,858 |
Percentage of Total Fees for Services Provided to Joint Ventures | 4.00% | 0.00%
Six Months Ended [Member] | POLAND |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 317,085 | 266,311
Percentage of Total Fees for Services Provided to Joint Ventures | 7.60% | 7.40%
Six Months Ended [Member] | THAILAND |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 282,999 | 301,989
Percentage of Total Fees for Services Provided to Joint Ventures | 6.80% | 8.40%
Six Months Ended [Member] | FRANCE |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 251,075 | 276,398
Percentage of Total Fees for Services Provided to Joint Ventures | 6.00% | 7.60%
Six Months Ended [Member] | Korea [Member] |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 270,221 | 262,131
Percentage of Total Fees for Services Provided to Joint Ventures | 6.50% | 7.20%
Six Months Ended [Member] | SWEDEN |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 202,193 | 164,619
Percentage of Total Fees for Services Provided to Joint Ventures | 4.80% | 4.60%
Six Months Ended [Member] | UNITED KINGDOM |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 154,632 | 102,812
Percentage of Total Fees for Services Provided to Joint Ventures | 3.70% | 2.80%
Six Months Ended [Member] | FINLAND |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 181,740 | 160,180
Percentage of Total Fees for Services Provided to Joint Ventures | 4.40% | 4.40%
Six Months Ended [Member] | Other Countries [Member] |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | 361,081 | 275,422
Percentage of Total Fees for Services Provided to Joint Ventures | 8.70% | 7.60%
Six Months Ended [Member] |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |
Fees for Services Provided to Joint Ventures (in Dollars) (in Dollars) | $ 4,167,319 | $ 3,617,158
Percentage of Total Fees for Services Provided to Joint Ventures | 100.00% | 100.00%

X
- 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

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- 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