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Note 7 - Corporate Debt (Details) (USD $)
3 Months Ended
Nov. 30, 2014
Nov. 30, 2013
Aug. 31, 2014
Term Loan and Line of Credit Agreements "Loan Agreements" [Member]      
Note 7 - Corporate Debt (Details) [Line Items]      
Debt Instrument, Covenants, Fixed Charge Coverage Ratio 1.10ntic_DebtInstrumentCovenantsFixedChargeCoverageRatio
/ us-gaap_DebtInstrumentAxis
= ntic_TermLoanAndLineOfCreditAgreementsLoanAgreementsMember
   
Term Loan [Member]      
Note 7 - Corporate Debt (Details) [Line Items]      
Long-term Debt, Gross   $ 914,384us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= ntic_TermLoanMember
 
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Note 7 - Corporate Debt (Details) [Line Items]      
Debt Instrument, Basis Spread on Variable Rate 2.15%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
   
Revolving Credit Facility [Member]      
Note 7 - Corporate Debt (Details) [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity 3,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
   
Long-term Line of Credit 0us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
  $ 0us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember