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Note 13 - Segment and Geographic Information (Details Textual)	12 Months Ended
	Aug. 31, 2022 USD ($)
Number of Reportable Segments	2
NTI Asean LLC [Member]
Recovery of Fees Previously Written Off	$ 681,859

X

- Definition

The recover of fees previously written off.

+ References

No definition available.

+ Details

Name:	ntic_RecoveryOfFeesPreviouslyWrittenOff
Namespace Prefix:	ntic_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8672-108599

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ntic_NTIAseanLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: