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Note 15 - Subsequent Event (Details) (USD $) | 9 Months Ended | 3 Months Ended
--- | --- | ---
Aug. 31, 2015 | Nov. 30, 2014
Scenario, Forecast [Member] | NTIC China [Member] |  |
Note 15 - Subsequent Event (Details) [Line Items] |  |
Investments in Wholly Owned Subsidiary | $ 1,500,000 ntic_InvestmentsInWhollyOwnedSubsidiary / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ntic_NTICChinaMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember |
NTIC China [Member] |  |
Note 15 - Subsequent Event (Details) [Line Items] |  |
Investments in Wholly Owned Subsidiary |  | 500,000 ntic_InvestmentsInWhollyOwnedSubsidiary / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = ntic_NTICChinaMember
Minimum [Member] | Termination of Joint Venture and Formation of NTIC China [Member] |  |
Note 15 - Subsequent Event (Details) [Line Items] |  |
Professional Fees |  | $ 225,000 us-gaap_ProfessionalFees / us-gaap_NatureOfExpenseAxis = ntic_TerminationOfJointVentureAndFormationOfNTICChinaMember / us-gaap_RangeAxis = us-gaap_MinimumMember

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- Definition The amount invested in the company's wholly owned subsidiary to serve as working capital for the subsidiary. + References No definition available. + Details
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- Definition A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07.2(a),(b),(c),(d)) -URI http://asc.fasb.org/extlink&oid=6488393&loc=d3e606610-122999 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 225 -Section 45 -Paragraph 3 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=6488370&loc=d3e13550-115849 + Details
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