Consolidated Balance Sheets (February 29, 2012 Unaudited) Consolidated Balance Sheets (February 29, 2012 Unaudited) [Abstract] ASSETS ASSETS [Abstract] CURRENT ASSETS: CURRENT ASSETS: [Abstract] Cash and cash equivalents Receivables: Receivables: [Abstract] Amount due from customers or clients, but not joint ventures, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Trade excluding joint ventures, less allowance for doubtful accounts of $20,000 at February 29, 2012 and August 31, 2011 Amounts due from joint ventures, within one year of the balance sheet date (or the normal operating cycle, whichever is longer) for goods or services (including trade receivables) that have been delivered or sold to joint ventures in the normal course of business. Trade joint ventures Amounts due for royalties and service fees outside of the normal course of business from entities in which the reporting entity shares joint control with another party or group, due within 1 year (or 1 business cycle). Fees for services provided to joint ventures Inventories Prepaid expenses Deferred income taxes Total current assets PROPERTY AND EQUIPMENT, NET OTHER ASSETS: OTHER ASSETS: [Abstract] Investments in joint ventures Deferred income taxes Patents and trademarks, net Other Total other assets Total assets LIABILITIES AND STOCKHOLDERS’ EQUITY LIABILITIES AND STOCKHOLDERS’ EQUITY [Abstract] CURRENT LIABILITIES: CURRENT LIABILITIES: [Abstract] Current portion of note payable Accounts payable Income tax payable Accrued liabilities: Accrued liabilities: [Abstract] Payroll and related benefits Deferred joint venture royalties Other Total current liabilities NOTE PAYABLE, NET OF CURRENT PORTION (Note 6) COMMITMENTS AND CONTINGENCIES (Note 13) EQUITY: EQUITY: [Abstract] Preferred stock, no par value; authorized 10,000 shares; none issued and Outstanding Common stock, $0.02 par value per share; authorized 10,000,000 shares; issued and outstanding 4,399,290 and 4,353,058, respectively Additional paid-in capital Retained earnings Accumulated other comprehensive income Stockholders’ equity Non-controlling interest Total equity Total liabilities and stockholders’ equity Trade, allowance (in Dollars) Preferred stock, par value (in Dollars per share) Preferred stock, shares authorized Preferred stock, shares issued Preferred stock, shares outstanding Common stock par value (in Dollars per share) Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Consolidated Statements of Operations (Unaudited) Consolidated Statements of Operations (Unaudited) [Abstract] NET SALES: NET SALES: [Abstract] Net sales either directly to end users or to distributors worldwide, but not sales to the reporting entity's joint ventures and not sales by the reporting entity's joint ventures. Net sales, excluding joint ventures Net sales by the reporting entity to the reporting entity's joint ventures, but not sales by the reporting entity either directly to end users or to distributors or sales by the reporting entity’s joint ventures. Net sales, to joint ventures Total net sales Cost of goods sold Gross profit JOINT VENTURE OPERATIONS: JOINT VENTURE OPERATIONS: [Abstract] Equity in income of joint ventures Royalties and service fees from transactions directly with the reporting entity's joint ventures outside the normal course of business. Fees for services provided to joint ventures Total joint venture operations OPERATING EXPENSES: OPERATING EXPENSES: [Abstract] Selling expenses General and administrative expenses Expenses incurred in support of joint ventures Research and development expenses Total operating expenses OPERATING INCOME INTEREST INCOME INTEREST EXPENSE OTHER INCOME INCOME BEFORE INCOME TAX EXPENSE INCOME TAX EXPENSE NET INCOME NET INCOME ATTRIBUTABLE TO NON CONTROLLING INTEREST NET INCOME ATTRIBUTABLE TO NTIC NET INCOME PER COMMON SHARE: NET INCOME PER COMMON SHARE: [Abstract] Basic (in Dollars per share) Diluted (in Dollars per share) WEIGHTED AVERAGE COMMON SHARES ASSUMED OUTSTANDING: WEIGHTED AVERAGE COMMON SHARES ASSUMED OUTSTANDING: [Abstract] Basic (in Shares) Diluted (in Shares) Consolidated Statements of Cash Flows (Unaudited) Consolidated Statements of Cash Flows (Unaudited) [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: CASH FLOWS FROM OPERATING ACTIVITIES: [Abstract] Net income Adjustments to reconcile net income to net cash used in operating activities: Adjustments to reconcile net income to net cash used in operating activities: [Abstract] Expensing of fair value of stock options vested Depreciation expense Amortization expense Equity in income from joint ventures Gain on sale of property and equipment Changes in current assets and liabilities: Changes in current assets and liabilities: [Abstract] Receivables: Receivables: [Abstract]0 The net change during the reporting period in amount due within one year (or one business cycle) from customers or clients, but not joint ventures, for the credit sale of goods and services. Trade, excluding joint ventures The net change during the reporting period in amount due within one year (or one business cycle) from joint ventures for the credit sale of goods and services that have been delivered or sold to joint ventures in the normal course of business. Trade, joint ventures The net change during the reporting period in amount due within one year (or one business cycle) from joint ventures for royalties and service fees outside of the normal course of business. Fees for services receivables, joint ventures Income taxes Inventories Prepaid expenses and other Accounts payable Income tax payable Accrued liabilities Net cash used in operating activities CASH FLOWS FROM INVESTING ACTIVITIES: CASH FLOWS FROM INVESTING ACTIVITIES: [Abstract] Investment in joint ventures Dividends received from joint ventures Additions to property and equipment Proceeds from sale of property and equipment Additions to patents Net cash provided by investing activities CASH FLOWS FROM FINANCING ACTIVITIES: CASH FLOWS FROM FINANCING ACTIVITIES: [Abstract] Repayment of note payable Proceeds from employee stock purchase plan Proceeds from exercise of stock options Net cash (used in) provided by financing activities EFFECT OF EXCHANGE RATE CHANGES ON CASH: NET INCREASE IN CASH AND CASH EQUIVALENTS CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD CASH AND CASH EQUIVALENTS AT END OF PERIOD Note 1 - Interim Financial Information Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Note 2 - Inventories Inventory Disclosure [Text Block] Note 3 - Property and Equipment, Net Property, Plant and Equipment Disclosure [Text Block] Note 4 - Patents and Trademarks, Net Intangible Assets Disclosure [Text Block] Note 5 - Investments in Joint Ventures Investment Holdings [Text Block] Note 6 - Corporate Debt Debt Disclosure [Text Block] Note 7 - Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Note 8 - Total Comprehensive Income Comprehensive Income (Loss) Note [Text Block] Note 9 - Net Income Per Common Share Earnings Per Share [Text Block] Note 10 - Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Note 11 - Geographic and Segment Information Segment Reporting Disclosure [Text Block] Note 12 - Research and Development Research, Development, and Computer Software Disclosure [Text Block] Note 13 - Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Scenario [Axis] Scenario, Unspecified [Domain] Document and Entity Information [Abstract] IncreaseDecreaseInTradeReceivablesExcludingJointVentures IncreaseDecreaseInFeesReceivableForServicesProvidedToJointVentures FeesForServicesProvidedToJointVentures IncreaseDecreaseInTradeReceivablesJointVentures Liabilities, Current Operating Expenses Weighted Average Number of Shares Outstanding, Basic Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Assets, Noncurrent Revenue, Net Net Cash Provided by (Used in) Investing Activities Document Period End Date Payments to Acquire Intangible Assets Net Cash Provided by (Used in) Operating Activities Cash and Cash Equivalents, Period Increase (Decrease) Assets, Current Amendment Flag Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Weighted Average Number of Shares Outstanding, Diluted Payments to Acquire Property, Plant, and Equipment Payments to Acquire Interest in Joint Venture Increase (Decrease) in Income Taxes Receivable Entity Central Index Key Increase (Decrease) in Prepaid Expense and Other Assets Net Cash Provided by (Used in) Financing Activities Entity Common Stock, Shares Outstanding Increase (Decrease) in Accounts Payable Repayments of Notes Payable Entity Filer Category Document Fiscal Year Focus Other Operating Income Entity Public Float Entity Voluntary Filers Operating Income (Loss) Liabilities and Equity Assets Entity Current Reporting Status Net Income (Loss) Attributable to Parent Entity Registrant Name Income (Loss), Including Portion Attributable to Noncontrolling Interest Gain (Loss) on Sale of Property Plant Equipment Entity Well-known Seasoned Issuer Increase (Decrease) in Income Taxes Payable Stockholders' Equity Attributable to Parent Increase (Decrease) in Inventories Amendment Description Document Type Gross Profit Other Accrued Liabilities, Current Current Fiscal Year End Date Document Fiscal Period Focus Interest Expense Statement [Table] Statement [Line Items]