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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
--- | ---
Nov. 30, 2012 | Nov. 30, 2011
Fees for services provided to joint ventures (in Dollars) | $ 1,846,277 | $ 1,445,252
Percentage of total fees for services provided to joint ventures | 100.00% | 100.00%
China [Member] |  |
Fees for services provided to joint ventures (in Dollars) | 493,312 |
Percentage of total fees for services provided to joint ventures | 26.70% | 0.00%
Germany [Member] |  |
Fees for services provided to joint ventures (in Dollars) | 242,700 | 249,447
Percentage of total fees for services provided to joint ventures | 13.10% | 17.30%
Japan [Member] |  |
Fees for services provided to joint ventures (in Dollars) | 201,981 | 288,539
Percentage of total fees for services provided to joint ventures | 10.90% | 20.00%
Thailand [Member] |  |
Fees for services provided to joint ventures (in Dollars) | 153,687 |
Percentage of total fees for services provided to joint ventures | 8.30% | 0.00%
Korea [Member] |  |
Fees for services provided to joint ventures (in Dollars) | 138,742 | 76,465
Percentage of total fees for services provided to joint ventures | 7.50% | 5.30%
France [Member] |  |
Fees for services provided to joint ventures (in Dollars) | 128,502 | 141,639
Percentage of total fees for services provided to joint ventures | 7.00% | 9.80%
Poland [Member] |  |
Fees for services provided to joint ventures (in Dollars) | 111,472 | 97,828
Percentage of total fees for services provided to joint ventures | 6.00% | 6.80%
Finland [Member] |  |
Fees for services provided to joint ventures (in Dollars) | 87,851 | 132,496
Percentage of total fees for services provided to joint ventures | 4.80% | 9.20%
Sweden [Member] |  |
Fees for services provided to joint ventures (in Dollars) | 86,992 | 156,657
Percentage of total fees for services provided to joint ventures | 4.70% | 10.80%
United Kingdom [Member] |  |
Fees for services provided to joint ventures (in Dollars) | 67,058 | 79,499
Percentage of total fees for services provided to joint ventures | 3.60% | 5.50%
India [Member] |  |
Fees for services provided to joint ventures (in Dollars) |  | 136,155
Percentage of total fees for services provided to joint ventures | 0.00% | 9.40%
Other Countries [Member] |  |
Fees for services provided to joint ventures (in Dollars) | $ 133,980 | $ 86,527
Percentage of total fees for services provided to joint ventures | 7.40% | 6.00%

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

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