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Note 1 - Allowance For Doubtful Accounts (Details) - USD ($) | 12 Months Ended
--- | ---
Aug. 31, 2015 | Aug. 31, 2014 | Aug. 31, 2013
Trade Receivable, Allowance for Doubtful Accounts | $ 40,000 | $ 20,000 | $ 20,000
Bad debts | 6,000 | 107,000 | 21,000
Adjustment to provision | (6,000) | (87,000) | (21,000)
Trade Receivable, Allowance for Doubtful Accounts | $ 40,000 | $ 40,000 | $ 20,000

X
- Definition Represents the allowance for doubtful accounts receivable adjustment to provision. + References No definition available. + Details
Name: | ntic_AllowanceForDoubtfulAccountsReceivableAdjustmentToProvision
Namespace Prefix: | ntic_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represents provision for doubtful accounts gross of adjustments. + References No definition available. + Details
Name: | ntic_ProvisionForDoubtfulAccountsGrossOfAdjustments
Namespace Prefix: | ntic_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant