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Note 14 - Income Taxes (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
May 31, 2024 | May 31, 2023 | May 31, 2024 | May 31, 2023
Foreign Withholding Tax | $ 332,400 | $ 542,295 | $ 848,391 | $ 834,823

X
- Definition The amount of foreign withholding tax. + References No definition available. + Details
Name: | ntic_ForeignWithholdingTax
Namespace Prefix: | ntic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration