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Note 11 - Segment and Geographic Information - Information by Geographic Location (Details) - USD ($) | 12 Months Ended
--- | ---
Aug. 31, 2024 | Aug. 31, 2023
Total Fees | $ 5,251,782 | $ 5,189,185
Total Fees percentage | 100.00% | 100.00%
POLAND |  |
Total Fees | $ 849,736 | $ 810,977
Total Fees percentage | 16.20% | 15.60%
GERMANY |  |
Total Fees | $ 828,932 | $ 816,089
Total Fees percentage | 15.80% | 15.70%
JAPAN |  |
Total Fees | $ 582,674 | $ 658,934
Total Fees percentage | 11.10% | 12.70%
FRANCE |  |
Total Fees | $ 485,627 | $ 479,515
Total Fees percentage | 9.30% | 9.20%
SWEDEN |  |
Total Fees | $ 445,560 | $ 498,463
Total Fees percentage | 8.50% | 9.60%
FINLAND |  |
Total Fees | $ 395,515 | $ 388,627
Total Fees percentage | 7.50% | 7.50%
UNITED KINGDOM |  |
Total Fees | $ 375,150 | $ 283,418
Total Fees percentage | 7.10% | 5.50%
CZECHIA |  |
Total Fees | $ 338,195 | $ 365,018
Total Fees percentage | 6.40% | 7.00%
THAILAND |  |
Total Fees | $ 332,148 | $ 340,657
Total Fees percentage | 6.30% | 6.60%
KOREA, REPUBLIC OF |  |
Total Fees | $ 258,314 | $ 266,562
Total Fees percentage | 4.90% | 5.10%
INDONESIA |  |
Total Fees | $ 166,053 | $ 130,081
Total Fees percentage | 3.20% | 2.50%
Other Countries [Member] |  |
Total Fees | $ 193,878 | $ 150,844
Total Fees percentage | 3.70% | 3.00%

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: | dtr-types: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: | srt_StatementGeographicalAxis=country_PL
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_DE
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_JP
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_FR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_SE
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_FI
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=country_CZ
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=country_TH
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_KR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=country_ID
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=ntic_OtherCountriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |