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Consolidated Statements of Cash Flows (Unaudited) (USD $) | 3 Months Ended
--- | ---
Nov. 30, 2014 | Nov. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net income | $ 1,464,096 us-gaap_ProfitLoss | $ 1,304,418 us-gaap_ProfitLoss
Adjustments to reconcile net income to net cash used in operating activities: |  |
Stock-based compensation | 143,897 us-gaap_ShareBasedCompensation | 127,927 us-gaap_ShareBasedCompensation
Depreciation expense | 117,690 us-gaap_Depreciation | 116,690 us-gaap_Depreciation
Amortization expense | 21,916 us-gaap_AdjustmentForAmortization | 21,434 us-gaap_AdjustmentForAmortization
Loss on disposal of assets | 12,561 us-gaap_GainLossOnDispositionOfAssets | 2,178 us-gaap_GainLossOnDispositionOfAssets
Loss on impairment of joint venture |  | 50,000 us-gaap_ImpairmentOfInvestments
Equity in income from joint ventures | (1,606,683)us-gaap_IncomeLossFromEquityMethodInvestments | (1,427,748)us-gaap_IncomeLossFromEquityMethodInvestments
Increase in allowance for doubtful accounts |  | 10,000 us-gaap_ProvisionForDoubtfulAccounts
Receivables: |  |
Trade, excluding joint ventures | 163,824 ntic_IncreaseDecreaseInTradeReceivablesExcludingJointVentures | (302,098)ntic_IncreaseDecreaseInTradeReceivablesExcludingJointVentures
Trade, joint ventures | 398,572 ntic_IncreaseDecreaseInTradeReceivablesJointVentures | 112,869 ntic_IncreaseDecreaseInTradeReceivablesJointVentures
Fees for services provided to joint ventures | (156,332)ntic_IncreaseDecreaseInFeesReceivableForServicesProvidedToJointVentures | (374,345)ntic_IncreaseDecreaseInFeesReceivableForServicesProvidedToJointVentures
Income taxes | (154,937)us-gaap_IncreaseDecreaseInIncomeTaxesReceivable | 52,837 us-gaap_IncreaseDecreaseInIncomeTaxesReceivable
Inventories | 276,298 us-gaap_IncreaseDecreaseInInventories | (309,071)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other | (338,643)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | (293,493)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Accounts payable | (18,080)us-gaap_IncreaseDecreaseInAccountsPayable | 546,639 us-gaap_IncreaseDecreaseInAccountsPayable
Income tax payable | 10,821 us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable | 320 us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable
Accrued liabilities | (804,762)us-gaap_IncreaseDecreaseInAccruedLiabilities | 203,699 us-gaap_IncreaseDecreaseInAccruedLiabilities
Net cash used in operating activities | (469,762)us-gaap_NetCashProvidedByUsedInOperatingActivities | (207,744)us-gaap_NetCashProvidedByUsedInOperatingActivities
CASH FLOWS FROM INVESTING ACTIVITIES: |  |
Dividends received from joint ventures | 85,641 us-gaap_ProceedsFromDividendsReceived | 12,500 us-gaap_ProceedsFromDividendsReceived
Additions to property and equipment | (470,711)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (166,299)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Proceeds from the sale of available for sale securities | 1,495,167 us-gaap_ProceedsFromDivestitureOfInterestInJointVenture |
Additions to patents | (52,397)us-gaap_PaymentsToAcquireIntangibleAssets | (58,639)us-gaap_PaymentsToAcquireIntangibleAssets
Net cash provided by (used in) investing activities | 1,057,700 us-gaap_NetCashProvidedByUsedInInvestingActivities | (212,438)us-gaap_NetCashProvidedByUsedInInvestingActivities
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Repayment of note payable |  | (19,030)us-gaap_RepaymentsOfNotesPayable
Dividend received by non-controlling interest | (560,000)us-gaap_PaymentsOfDividendsMinorityInterest |
Proceeds from employee stock purchase plan | 22,620 us-gaap_ProceedsFromStockPlans | 21,255 us-gaap_ProceedsFromStockPlans
Proceeds from exercise of stock options | 99,450 us-gaap_ProceedsFromStockOptionsExercised | 7,650 us-gaap_ProceedsFromStockOptionsExercised
Net cash (used in) provided by financing activities | (437,930)us-gaap_NetCashProvidedByUsedInFinancingActivities | 9,875 us-gaap_NetCashProvidedByUsedInFinancingActivities
EFFECT OF EXCHANGE RATE CHANGES ON CASH: | (28,286)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents | 3,420 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS | 121,722 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (406,887)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD | 2,477,017 us-gaap_CashAndCashEquivalentsAtCarryingValue | 4,314,258 us-gaap_CashAndCashEquivalentsAtCarryingValue
CASH AND CASH EQUIVALENTS AT END OF PERIOD | $ 2,598,739 us-gaap_CashAndCashEquivalentsAtCarryingValue | $ 3,907,371 us-gaap_CashAndCashEquivalentsAtCarryingValue

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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the amount received from the stock plan during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
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- Definition The cash outflow for a borrowing supported by a written promise to pay an obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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