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v3.23.2

Note 11 - Segment and Geographic Information - Total Long-lived Assets by Geographic Distribution (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
May 31, 2023 | May 31, 2022 | May 31, 2023 | May 31, 2022
Fees | $ 1,361,311 | $ 1,329,988 | $ 3,795,862 | $ 3,835,755
Percentage of fee | 100.00% | 100.00% | 100.00% | 100.00%
POLAND |  |  |  |
Fees | $ 224,288 | $ 171,181 | $ 610,911 | $ 520,807
Percentage of fee | 16.50% | 12.90% | 16.10% | 13.60%
GERMANY |  |  |  |
Fees | $ 209,398 | $ 204,316 | $ 606,189 | $ 639,738
Percentage of fee | 15.40% | 15.40% | 16.00% | 16.70%
JAPAN |  |  |  |
Fees | $ 152,593 | $ 168,075 | $ 454,308 | $ 486,815
Percentage of fee | 11.20% | 12.60% | 12.00% | 12.70%
SWEDEN |  |  |  |
Fees | $ 144,981 | $ 130,681 | $ 358,032 | $ 337,929
Percentage of fee | 10.70% | 9.80% | 9.40% | 8.80%
FRANCE |  |  |  |
Fees | $ 128,149 | $ 123,869 | $ 356,444 | $ 355,827
Percentage of fee | 9.40% | 9.30% | 9.40% | 9.30%
FINLAND |  |  |  |
Fees | $ 103,879 | $ 92,036 | $ 285,931 | $ 257,635
Percentage of fee | 7.60% | 6.90% | 7.50% | 6.70%
CZECHIA |  |  |  |
Fees | $ 99,090 | $ 84,797 | $ 270,422 | $ 224,280
Percentage of fee | 7.30% | 6.40% | 7.10% | 5.80%
THAILAND |  |  |  |
Fees | $ 82,725 | $ 95,574 | $ 257,282 | $ 271,046
Percentage of fee | 6.10% | 7.20% | 6.80% | 7.10%
UNITED KINGDOM |  |  |  |
Fees | $ 83,586 | $ 89,363 | $ 206,925 | $ 271,027
Percentage of fee | 6.10% | 6.70% | 5.50% | 7.10%
KOREA, REPUBLIC OF |  |  |  |
Fees | $ 61,669 | $ 78,542 | $ 190,866 | $ 205,342
Percentage of fee | 4.50% | 5.90% | 5.00% | 5.40%
Other Countries [Member] |  |  |  |
Fees | $ 70,953 | $ 91,554 | $ 198,552 | $ 265,309
Percentage of fee | 5.20% | 6.90% | 5.20% | 6.80%

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_SE
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_FI
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- 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: |

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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_KR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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