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Note 11 - Geographic And Segment Information (Detail) - 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
--- | --- | ---
Feb. 28, 2013 | Feb. 29, 2012 | Feb. 28, 2013 | Feb. 29, 2012
Total Fees for Services Provided to Joint Ventures (in Dollars) | $ 1,770,881 |  | $ 1,298,126 |  | $ 3,617,158 |  | $ 2,743,378 |
Percentage of Total Fees for Services Provided to Joint Ventures | 100.00% |  | 100.00% |  | 100.00% |  | 100.00% |
China [Member] |  |  |  |  |  |  |  |
Total Fees for Services Provided to Joint Ventures (in Dollars) | 450,586 | [1] |  | [1] | 943,897 | [1] |  | [1]
Percentage of Total Fees for Services Provided to Joint Ventures | 25.40% | [1] | 0.00% | [1] | 26.10% | [1] | 0.00% | [1]
Germany [Member] |  |  |  |  |  |  |  |
Total Fees for Services Provided to Joint Ventures (in Dollars) | 249,513 |  | 251,387 |  | 492,213 |  | 500,833 |
Percentage of Total Fees for Services Provided to Joint Ventures | 14.10% |  | 19.40% |  | 13.60% |  | 18.30% |
Japan [Member] |  |  |  |  |  |  |  |
Total Fees for Services Provided to Joint Ventures (in Dollars) | 169,205 |  | 214,984 |  | 371,186 |  | 503,522 |
Percentage of Total Fees for Services Provided to Joint Ventures | 9.60% |  | 16.60% |  | 10.30% |  | 18.40% |
Poland [Member] |  |  |  |  |  |  |  |
Total Fees for Services Provided to Joint Ventures (in Dollars) | 154,839 |  | 130,470 |  | 301,989 |  |  |
Percentage of Total Fees for Services Provided to Joint Ventures | 8.70% |  | 10.10% |  | 8.40% |  | 0.00% |
Thailand [Member] |  |  |  |  |  |  |  |
Total Fees for Services Provided to Joint Ventures (in Dollars) | 148,303 | [1] |  | [1] | 276,398 | [1] | 268,643 | [1]
Percentage of Total Fees for Services Provided to Joint Ventures | 8.40% | [1] | 0.00% | [1] | 7.60% | [1] | 9.80% | [1]
France [Member] |  |  |  |  |  |  |  |
Total Fees for Services Provided to Joint Ventures (in Dollars) | 147,896 |  | 127,004 |  | 266,311 |  | 228,298 |
Percentage of Total Fees for Services Provided to Joint Ventures | 8.30% |  | 9.80% |  | 7.40% |  | 8.30% |
Korea [Member] |  |  |  |  |  |  |  |
Total Fees for Services Provided to Joint Ventures (in Dollars) | 123,388 | [2] | 532 | [2] | 262,131 | [2] | 76,997 | [2]
Percentage of Total Fees for Services Provided to Joint Ventures | 7.00% | [2] | 0.00% | [2] | 7.20% | [2] | 2.80% | [2]
Sweden [Member] |  |  |  |  |  |  |  |
Total Fees for Services Provided to Joint Ventures (in Dollars) | 77,627 |  | 148,277 |  | 164,619 |  | 304,934 |
Percentage of Total Fees for Services Provided to Joint Ventures | 4.40% |  | 11.40% |  | 4.60% |  | 11.10% |
Finland [Member] |  |  |  |  |  |  |  |
Total Fees for Services Provided to Joint Ventures (in Dollars) | 72,329 |  | 118,911 |  | 160,180 |  | 251,407 |
Percentage of Total Fees for Services Provided to Joint Ventures | 4.10% |  | 9.20% |  | 4.40% |  | 9.20% |
United Kingdom [Member] |  |  |  |  |  |  |  |
Total Fees for Services Provided to Joint Ventures (in Dollars) | 35,754 |  | 80,639 |  | 102,812 |  | 160,138 |
Percentage of Total Fees for Services Provided to Joint Ventures | 2.00% |  | 6.20% |  | 2.80% |  | 5.80% |
India [Member] |  |  |  |  |  |  |  |
Total Fees for Services Provided to Joint Ventures (in Dollars) |  |  | 163,689 |  |  |  | 299,844 |
Percentage of Total Fees for Services Provided to Joint Ventures | 0.00% |  | 12.60% |  | 0.00% |  | 10.90% |
Other Countries [Member] |  |  |  |  |  |  |  |
Total Fees for Services Provided to Joint Ventures (in Dollars) | $ 141,441 |  | $ 62,233 |  | $ 275,422 |  | $ 148,762 |
Percentage of Total Fees for Services Provided to Joint Ventures | 8.00% |  | 4.80% |  | 7.60% |  | 5.40% |
[1] | Joint venture owned by NTI Asean.
[2] | Joint venture owned by NTI Asean as of February 28, 2013, but not as of February 29, 2012. NTI Asean results are not included on the consolidated financial statements for the three months ended February 29, 2012. (See Note 2)

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

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