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Note 6 - Investments in Joint Ventures (Details) (USD $)
3 Months Ended
Nov. 30, 2014
Nov. 30, 2013
Aug. 31, 2014
Note 6 - Investments in Joint Ventures (Details) [Line Items]      
Payments to Acquire Interest in Joint Venture $ 0us-gaap_PaymentsToAcquireInterestInJointVenture $ 0us-gaap_PaymentsToAcquireInterestInJointVenture  
Other than Temporary Impairment Losses, Investments   50,000us-gaap_ImpairmentOfInvestments  
Mutec [Member]      
Note 6 - Investments in Joint Ventures (Details) [Line Items]      
Other than Temporary Impairment Losses, Investments   50,000us-gaap_ImpairmentOfInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= ntic_MutecMember
 
Due from Joint Ventures 150,733us-gaap_DueFromJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= ntic_MutecMember
  156,854us-gaap_DueFromJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= ntic_MutecMember
Mutec [Member]      
Note 6 - Investments in Joint Ventures (Details) [Line Items]      
Financing Receivable, Net   $ 168,000us-gaap_NotesReceivableNet
/ dei_LegalEntityAxis
= ntic_MutecMember