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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