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Note 13 - Segment and Geographic Information (Details Textual) | 12 Months Ended
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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

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- 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

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