Northern Technologies International (NTIC) 10-Q 11 Apr 17 2017 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Feb. 28, 2017	Apr. 11, 2017
Document Information [Line Items]
Entity Registrant Name	Northern Technologies International Corporation
Entity Central Index Key	875,582
Trading Symbol	ntic
Current Fiscal Year End Date	--08-31
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		4,524,970
Document Type	10-Q
Document Period End Date	Feb. 28, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Amendment Flag	false

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($)	Feb. 28, 2017	Aug. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 3,048,948	$ 3,395,274
Available for sale securities	748,254	2,243,864
Trade excluding joint ventures, less allowance for doubtful accounts of $40,000 at February 28, 2017 and August 31, 2016	5,916,486	4,755,320
Trade joint ventures	462,582	791,903
Fees for services provided to joint ventures	1,242,569	1,406,587
Income taxes	240,534	215,905
Inventories	8,052,207	7,711,287
Prepaid expenses	614,735	422,031
Total current assets	20,326,315	20,942,171
PROPERTY AND EQUIPMENT, NET	7,485,197	7,275,872
OTHER ASSETS:
Investments in joint ventures	21,059,113	19,840,774
Deferred income taxes	1,614,229	1,639,762
Patents and trademarks, net	1,305,039	1,278,597
Other		92,874
Total other assets	23,978,381	22,852,007
Total assets	51,789,893	51,070,050
CURRENT LIABILITIES:
Accounts payable	3,565,903	2,753,903
Accrued liabilities:
Payroll and related benefits	708,411	938,363
Other	687,164	301,836
Total current liabilities	4,961,478	3,994,102
COMMITMENTS AND CONTINGENCIES (Note 13)
EQUITY:
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 4,524,970 and 4,533,416, respectively	90,499	90,668
Additional paid-in capital	13,879,361	13,798,567
Retained earnings	34,339,958	33,655,357
Accumulated other comprehensive loss	(4,015,577)	(3,009,617)
Stockholders’ equity	44,294,241	44,534,975
Non-controlling interest	2,534,174	2,540,973
Total equity	46,828,415	47,075,948
Total liabilities and equity	$ 51,789,893	$ 51,070,050

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($)	Feb. 28, 2017	Aug. 31, 2016
Trade allowance	$ 40,000	$ 40,000
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	10,000	10,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.02	$ 0.02
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	4,524,970	4,533,416
Common stock, shares outstanding (in shares)	4,524,970	4,533,416

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
NET SALES:
Net sales, excluding joint ventures	$ 8,309,586	$ 7,027,614	$ 17,191,551	$ 13,529,024
Net sales, to joint ventures	433,317	677,320	1,253,375	1,200,347
Total net sales	8,742,903	7,704,934	18,444,926	14,729,371
Cost of goods sold	5,870,186	5,268,224	12,482,952	10,143,647
Gross profit	2,872,717	2,436,710	5,961,974	4,585,724
JOINT VENTURE OPERATIONS:
Equity in income of joint ventures	1,383,139	952,667	2,657,143	1,936,420
Fees for services provided to joint ventures	1,184,028	971,042	2,499,619	2,456,471
Total joint venture operations	2,567,167	1,923,709	5,156,762	4,392,891
OPERATING EXPENSES:
Selling expenses	2,246,482	1,475,433	4,285,566	3,000,516
General and administrative expenses	1,842,528	1,806,557	4,314,308	3,981,164
Research and development expenses	742,037	1,113,525	1,384,559	2,117,622
Total operating expenses	4,831,047	4,395,515	9,984,433	9,099,302
OPERATING INCOME (LOSS)	608,837	(35,096)	1,134,303	(120,687)
INTEREST INCOME	4,516	14,384	8,079	28,557
INTEREST EXPENSE	(3,470)	(10,796)	(8,093)	(15,522)
OTHER INCOME		961		961
INCOME (LOSS) BEFORE INCOME TAX EXPENSE	609,883	(30,547)	1,134,289	(106,691)
INCOME TAX EXPENSE	124,909	40,466	242,622	36,964
NET INCOME (LOSS)	484,974	(71,013)	891,667	(143,655)
NET INCOME ATTRIBUTABLE TO NON-CONTROLLING INTERESTS	98,008	36,776	207,062	198,485
NET INCOME (LOSS) ATTRIBUTABLE TO NTIC	$ 386,966	$ (107,789)	$ 684,605	$ (342,140)
NET INCOME (LOSS) ATTRIBUTABLE TO NTIC PER COMMON SHARE:
Basic (in dollars per share)	$ 0.09	$ (0.02)	$ 0.15	$ (0.08)
Diluted (in dollars per share)	$ 0.09	$ (0.02)	$ 0.15	$ (0.08)
WEIGHTED AVERAGE COMMON SHARES ASSUMED OUTSTANDING:
Basic (in shares)	4,525,091	4,537,429	4,527,555	4,536,995
Diluted (in shares)	4,562,024	4,537,429	4,559,485	4,536,995

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
NET INCOME (LOSS)	$ 484,974	$ (71,013)	$ 891,667	$ (143,655)
Other comprehensive income (LOSS) – foreign currency translation adjustment	230,991	380,398	(1,019,821)	(484,730)
COMPREHENSIVE INCOME (LOSS)	715,965	309,385	(128,154)	(628,385)
COMPREHENSIVE INCOME ATTRIBUTABLE TO NON- CONTROLLING INTERESTS	132,829	21,377	193,200	186,152
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO NTIC	$ 583,136	$ 288,008	$ (321,354)	$ (814,537)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 891,667	$ (143,655)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Stock-based compensation	195,832	223,715
Depreciation expense	385,583	321,437
Amortization expense	59,517	59,517
Equity in income from joint ventures	(2,657,143)	(1,936,420)
Deferred income taxes	24,987
Dividends received from joint ventures	564,934	4,054,606
Receivables:
Trade, excluding joint ventures	(1,177,496)	(165,856)
Trade, joint ventures	329,321	(118,640)
Fees for services provided to joint ventures	164,018	242,537
Income taxes	(16,484)	(355,200)
Inventories	(349,600)	111,146
Prepaid expenses and other	(103,671)	(162,301)
Accounts payable	915,538	(174,609)
Income tax payable	(91,282)	2,564
Accrued liabilities	40,854	(710,031)
Net cash (used in) provided by operating activities	(823,425)	1,248,810
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from the sale of available for sale securities	1,495,610
Purchase of available for sale securities		(705,638)
Additions to property and equipment	(599,063)	(346,872)
Additions to patents	(85,959)	(28,057)
Net cash provided by (used in) investing activities	810,588	(1,080,567)
CASH FLOWS FROM FINANCING ACTIVITIES:
Dividend received by non-controlling interest	(200,000)	(200,000)
Repurchase of common stock	(148,162)	(70,549)
Proceeds from employee stock purchase plan	32,955	34,963
Net cash used in financing activities	(315,207)	(235,586)
EFFECT OF EXCHANGE RATE CHANGES ON CASH:	(18,282)	(25,298)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(346,326)	(92,641)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	3,395,274	2,623,981
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 3,048,948	$ 2,531,340

Note 1 - Interim Financial Info

Note 1 - Interim Financial Information	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. In the opinion of management, the accompanying unaudited consolidated financial statements contain all necessary adjustments, which are of a normal recurring nature, and present fairly the consolidated financial position of Northern Technologies International Corporation and its subsidiaries (the Company) as of February 28, 2017 August 31, 2016 three six February 28, 2017 February 29, 2016 six February 28, 2017 February 29, 2016, These consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes contained in the Company’s annual report on Form 10 August 31, 2016. Operating results for the three six February 28, 2017 may August 31, 2016. The Company evaluates events occurring after the date of the consolidated financial statements requiring recording or disclosure in the consolidated financial statements. Certain amounts reported in the consolidated financial statements for the previous reporting period have been reclassified to conform to the current period presentation. Expenses previously recorded as “Expenses incurred in support of joint ventures” have been reclassified as “General and administrative expenses” based on the reduction in direct costs associated with supporting the joint ventures.

Note 2 - Recently Issued Accoun

Note 2 - Recently Issued Accounting Pronouncements	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Description of New Accounting Pronouncements Not yet Adopted [Text Block]	2. Recently Issued Accounting PronouncementS In May 2014, Revenue from Contracts with Customers, Topic 606 2014 09), 2018. July 2015, one first 2019. 2014 09 In July 2015, 2015 11, Inventory first first 2018, 2015 11 In November 2015, 2015 17, Income Taxes (Topic 740) December 15, 2017, 2015 17 August 31, 2016; During February 2016, 2016 02, Leases 2016 02 12 2016 02 December 15, 2018, 2016 02 In March 2016, 2016 07, Investments – Equity Method and Joint Ventures (Topic 323): 2016 07 December 15, 2016. 2016 07 In March 2016, 2016 09, Stock Compensation December 15, 2016, 2016 09 Although there are several other new accounting pronouncements issued or proposed by the FASB, which the Company has adopted or will adopt, as applicable, the Company does not believe any of these accounting pronouncements has had or will have a material impact on the Company’s consolidated financial position or operating results.

Note 3 - Inventories

Note 3 - Inventories	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Inventory Disclosure [Text Block]	3. Inventories consisted of the following: February 28, 2017 August 31, 2016 Production materials $ 1,302,043 $ 1,452,396 Finished goods 6,750,164 6,258,891 $ 8,052,207 $ 7,711,287

Note 4 - Property and Equipment

Note 4 - Property and Equipment, Net	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	4. Property and equipment, net consisted of the following: February 28, 2017 August 31, 2016 Land $ 310,365 $ 310,365 Buildings and improvements 6,980,663 6,528,252 Machinery and equipment 3,674,867 3,590,063 10,965,895 10,428,680 Less accumulated depreciation (3,480,698 ) (3,152,808 ) $ 7,485,197 $ 7,275,872

Note 5 - Patents and Trademarks

Note 5 - Patents and Trademarks, Net	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Intangible Assets Disclosure [Text Block]	5. Patents and trademarks, net consisted of the following: February 28, 2017 August 31, 2016 Patents and trademarks $ 2,661,393 $ 2,575,435 Less accumulated amortization (1,356,354 ) (1,296,838 ) $ 1,305,039 $ 1,278,597 Patent and trademark costs are amortized over seven $120,000 five

Note 6 - Investments in Joint V

Note 6 - Investments in Joint Ventures	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Equity Method Investments and Joint Ventures Disclosure [Text Block]	6. The financial statements of the Company’s foreign joint ventures are initially prepared using the accounting principles accepted in the respective joint ventures’ countries of domicile. Amounts related to foreign joint ventures reported in the below tables and the accompanying consolidated financial statements have subsequently been adjusted to conform with accounting principles generally accepted in the United States of America in all material respects. All material profits recorded on sales from the Company to its joint ventures and from joint ventures to other joint ventures have been eliminated for financial reporting purposes. Financial information from the audited and unaudited financial statements of the Company’s joint ventures in Germany, Excor Korrosionsschutz – Technologien und Produkte GmbH (EXCOR), Harita-NTI LTD (INDIA), Zerust OY (FINLAND) and all the Company’s other joint ventures, are summarized as follows: As of February 28, 2017 TOTAL EXCOR INDIA FINLAND All Other Current assets $ 51,803,644 $ 25,396,338 $ 4,342,356 $ 1,625,779 $ 20,439,171 Total assets 55,467,386 27,220,507 4,674,322 1,905,434 21,667,123 Current liabilities 13,028,897 3,027,106 1,485,452 484,988 8,031,351 Noncurrent liabilities 107,511 — 3,684 — 103,827 Joint ventures’ equity 42,330,978 24,193,401 3,185,186 1,420,446 13,531,945 Northern Technologies International Corporation’s share of joint ventures’ equity 21,059,113 12,096,702 1,592,593 710,221 6,659,597 Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings $ 18,984,898 $ 12,065,797 $ 727,771 $ 690,221 $ 5,501,109 Six Months Ended February 28, 2017 Total EXCOR INDIA FINLAND All Other Net sales $ 47,163,046 $ 18,285,432 $ 3,263,830 $ 1,726,555 $ 23,887,229 Gross profit 20,858,536 9,761,696 1,518,122 1,032,318 8,546,400 Net income 5,182,951 4,017,746 192,164 252,140 720,901 Northern Technologies International Corporation’s share of equity in income of joint ventures $ 2,657,143 $ 2,006,441 $ 170,549 $ 126,361 $ 353,792 Northern Technologies International Corporation’s dividends received from joint ventures $ 564,934 $ — $ 206,701 $ 200,768 $ 157,465 As of August 31, 2016 TOTAL EXCOR INDIA FINLAND All Other Current assets $ 48,922,924 $ 22,928,810 $ 4,027,016 $ 1,928,861 $ 20,038,237 Total assets 52,407,026 24,733,340 4,352,573 2,211,392 21,109,721 Current liabilities 12,433,700 3,485,213 1,097,231 546,506 7,304,730 Noncurrent liabilities 100,783 — 6,382 — 94,401 Joint ventures’ equity 39,872,543 21,248,109 3,248,960 1,664,886 13,710,588 Northern Technologies International Corporation’s share of joint ventures’ equity 19,840,774 10,624,056 1,624,480 832,442 6,759,796 Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings $ 17,779,912 $ 10,593,151 $ 759,658 $ 812,442 $ 5,614,661 Northern Technologies International Corporation's dividends received from joint ventures $ 5,503,314 $ 4,364,700 $ 326,023 $ 206,516 $ 606,075 Six Months Ended February 29, 2016 Total EXCOR INDIA FINLAND All Other Net sales $ 42,000,424 $ 15,618,735 $ 3,036,404 $ 1,581,287 $ 21,763,999 Gross profit 18,523,102 8,059,186 1,450,777 943,141 8,069,998 Net income 3,872,728 2,960,951 316,292 207,973 387,512 Northern Technologies International Corporation’s share of equity in income of joint ventures 1,936,420 1,480,975 157,474 104,070 193,900 Northern Technologies International Corporation’s dividends received from joint ventures $ 4,054,605 $ 32,523,000 $ 326,023 $ 206,516 $ 269,766 The Company did not six February 28, 2017 February 29, 2016.

Note 7 - China Operations

Note 7 - China Operations	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Fair Value Disclosures [Text Block]	7. Effective December 31, 2014, January 1, 2015. December 31, 2014, December 31, 2014, fourth 2016, 13). $0 August 31, 2016 13

Note 8 - Corporate Debt

Note 8 - Corporate Debt	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Debt Disclosure [Text Block]	8. The Company has a revolving line of credit with PNC Bank of $3,000,000. February 28, 2017 August 31, 2016. 2.15% The revolving credit facility allows the Company to request that PNC Bank issue letters of credit up to $1,200,000. not February 28, 2017 August 31, 2016 On January 11, 2017, January 7, 2018. As of February 28, 2017 August 31, 2016, $75,201 $71,599, 2020 2022.

Note 9 - Stockholders' Equity

Note 9 - Stockholders' Equity	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	9. During the six February 28, 2017, 11,475 $12.92 six February 28, 2017. The Company granted stock options under the Northern Technologies International Corporation Amended and Restated 2007 2007 56,677 six February 28, 2017. $13.40, During the six February 29, 2016, 5,461 $12.92 No six February 29, 2016. The Company granted stock options under the 2007 53,447 six February 29, 2016. $14.85,

Note 10 - Net Income (Loss) Per

Note 10 - Net Income (Loss) Per Common Share	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Earnings Per Share [Text Block]	10. Basic net income (loss) per common share is computed by dividing net income (loss) by the weighted average number of common shares outstanding. Diluted net income per share assumes the exercise of stock options using the treasury stock method, if dilutive. The following is a reconciliation of the earnings per share computation for the three six February 28, 2017 February 29, 2016: Three Months Ended Six Months Ended Numerators: February 28, February February 28, February Net income (loss) attributable to NTIC $ 386,966 $ (107,789 ) $ 684,605 $ (342,140 ) Denominators: Basic – weighted shares outstanding 4,525,091 4,537,429 4,527,555 4,536,995 Weighted shares assumed upon exercise of stock options 36,933 — 31,930 — Diluted – weighted shares outstanding 4,562,024 4,537,429 4,559,485 4,536,995 Basic income (loss) per share: $ 0.09 $ (0.02 ) $ 0.15 $ (0.08 ) Diluted income (loss) per share: $ 0.09 $ (0.02 ) $ 0.15 $ (0.08 ) The dilutive impact summarized above relates to the periods when the average market price of the Company’s common stock exceeded the exercise price of the potentially dilutive option securities granted. Earnings per common share were based on the weighted average number of common shares outstanding during the periods when computing the basic earnings per share. When dilutive, stock options are included as equivalents using the treasury stock market method when computing the diluted earnings per share. There were 275,791 February 28, 2017 Excluded from the computation of diluted income per share for the three six February 28, 2017 48,067 three February 29, 2016 283,181

Note 11 - Stock-based Compensat

Note 11 - Stock-based Compensation	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	11. The Company has two 2007 The 2007 2007 800,000 2007 2007 ten three four one February 28, 2017, 2007 The maximum number of shares of common stock of the Company available for issuance under the ESPP is 100,000 six September 1 March 1 90% may 423 1986, The Company granted options to purchase an aggregate of 56,677 53,447 six February 28, 2017 February 29, 2016, $195,832 $223,715 six February 28, 2017 February 29, 2016, February 28, 2017, $435,232, $195,832 2017, $159,600 $79,800 2018 2019, February 28, 2017. The Company currently estimates a ten The fair value of each option grant is estimated on the grant date using the Black-Scholes option-pricing model with the following assumptions and results for the grants: Six Months Ended February 28, February 29, Dividend yield 0.00 % 0.00 % Expected volatility 46.4 % 46.0 % Expected life of option (in years) 10 10 Average risk-free interest rate 1.63 % 1.63 % The weighted average per share fair value of options granted during six February 28, 2017 February 29, 2016 $7.69 $8.48, February 28, 2017 February 29, 2016 6.91 6.96

Note 12 - Segment and Geographi

Note 12 - Segment and Geographic Information	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	12. Segment Information The Company’s chief operating decision maker (“CODM”) is its Chief Executive Officer. The Company’s business is organized into two 40 The following table sets forth the Company’s net sales for the three six February 28, 2017 February 29, 2016 Three Months Ended Six Months Ended February 28, February 29, February 28, February 29, ZERUST® net sales $ 7,228,027 $ 6,385,337 $ 15,312,705 $ 12,363,019 Natur-Tec® net sales 1,514,876 1,319,597 3,132,221 2,366,352 Total net sales $ 8,742,903 $ 7,704,934 $ 18,444,926 $ 14,729,371 The following table sets forth the Company’s cost of goods sold for the three six February 28, 2017 February 29, 2016 Three Months Ended Six Months Ended February 28, % of February 29, % of February 28, % of February 29, % of Direct cost of goods sold ZERUST® $ 4,254,524 58.9 % $ 3,576,073 56.0 % $ 8,954,061 58.5 % $ 6,940,628 56.1 % Natur-Tec® 1,068,231 70.5 % 984,938 74.6 % 2,281,399 72.8 % 1,819,197 76.9 % Indirect cost of goods sold 547,431 — 707,213 — 1,247,492 — 1,383,822 — Total net cost of goods sold $ 5,870,186 $ 5,268,224 $ 12,482,952 $ 10,143,647 ______________________ * The percent of segment sales is calculated by dividing the direct cost of goods sold for each individual segment category by the net sales for each segment category. The Company utilizes product net sales and direct and indirect cost of goods sold for each product in reviewing the financial performance of a product type. Further allocation of Company expenses or assets, aside from amounts presented in the tables above, is not utilized in evaluating product performance, nor does such allocation occur for internal financial reporting. Geographic Information Net sales by geographic location for the three six February 28, 2017 February 29, 2016 Three Months Ended Six Months Ended February 28, February 29, February 28, February 29, Inside the U.S.A. to unaffiliated customers $ 5,245,092 $ 4,683,208 $ 10,395,832 $ 9,522,987 Outside the U.S.A to: Joint ventures in which the Company is shareholder directly and indirectly 433,317 677,320 1,253,375 1,200,347 Unaffiliated customers 3,064,494 2,344,406 6,795,719 4,006,037 $ 8,742,903 $ 7,704,934 $ 18,444,926 $ 14,729,371 Net sales by geographic location are based on the location of the customer. Fees for services provided to joint ventures by geographic location as a percentage of total fees for services provided to joint ventures during the three six February 28, 2017 February 29, 2016 Three Months Ended February 28, % of Total Fees February 29, % of Total Fees Germany $ 199,509 16.8 % $ 192,869 19.9 % Poland 153,453 13.0 % 145,765 15.0 % Japan 145,722 12.3 % 137,476 14.2 % Thailand 87,627 7.4 % 39,322 4.0 % Korea 86,103 7.3 % 2,500 .3 % France 83,112 7.0 % 73,112 7.5 % Sweden 77,464 6.5 % 50,356 5.2 % Czech Republic 73,286 6.2 % 64,381 6.6 % Finland 66,946 5.7 % 52,896 5.5 % United Kingdom 53,241 4.5 % 64,735 6.7 % India 74,196 6.3 % 72,077 7.4 % Other 83,369 7.0 % 75,553 7.7 % $ 1,184,028 100.0 % $ 971,042 100.0 % Six Months Ended February 28, % of Total Fees February 29, % of Total Fees Germany $ 402,509 16.1 % $ 422,654 17.2 % Poland 302,657 12.1 % 285,023 11.6 % Japan 291,759 11.7 % 268,149 10.9 % Thailand 235,081 9.4 % 263,063 10.7 % Korea 191,481 7.6 % 171,902 7.0 % France 180,785 7.2 % 162,785 6.6 % Sweden 164,525 6.6 % 123,317 5.0 % Czech Republic 144,114 5.8 % 121,933 5.0 % Finland 143,282 5.7 % 121,829 5.0 % United Kingdom 139,372 5.6 % 173,646 7.1 % India 138,731 5.6 % 152,527 6.2 % Other 165,323 6.6 % 189,643 7.7 % $ 2,499,619 100.0 % $ 2,456,471 100.0 % Sales to the Company’s joint ventures are included in the foregoing geographic and segment information, however, sales by the Company’s joint ventures to other parties are not included. The foregoing geographic and segment information represents only sales and cost of goods sold recognized directly by the Company. The geographical distribution of key financial statement data is as follows: At February 28, At August 31, Brazil $ 63,765 $ 66,938 India 12,027 13,645 Germany 15,512 — China 200,452 253,931 United States 7,193,441 6,941,358 Total long-lived assets $ 7,485,197 $ 7,275,872 Six Months Ended February 28, February 29, Brazil $ 1,118,166 $ 997,636 India 733,581 549,402 Germany 217,496 — China 3,296,299 1,439,754 United States 13,079,384 11,742,579 Total net sales $ 18,444,926 $ 14,729,371 Total long-lived assets located in Brazil, India, Germany and China primarily consist of property and equipment. These assets are periodically reviewed to assure the net realizable value from the estimated future production based on forecasted sales exceeds the carrying value of the assets. Total assets located in the United States include the Company’s investments in joint ventures. Sales to the Company’s joint ventures are included in the foregoing segment and geographic information; however, sales by the Company’s joint ventures to other parties are not included. The foregoing geographic and segment information represents only sales and cost of goods sold recognized directly by the Company. All joint venture operations including equity in income, fees for services and related dividends are related to ZERUST® products and services.

Note 13 - Commitments and Conti

Note 13 - Commitments and Contingencies	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	13. On August 26, 2016, August 31, 2017. 2017 75% 2017 2017 25% may 2017. $185,000 six February 28, 2017 no six February 29, 2016. Three joint ventures (consisting of the Company’s joint ventures in Korea, India and Thailand) accounted for 57.1% February 28, 2017 55.8% August 31, 2016. On March 23, 2015, 1 two February 28, 2017, On April 21, 2015, November 23, 2017, February 16, 2017, sua sponte March 9, 2017, February 16, 2017 From time to time, the Company is subject to various other claims and legal actions in the ordinary course of its business. The Company records a liability in its consolidated financial statements for costs related to claims, including future legal costs, settlements and judgments, where the Company has assessed that a loss is probable and an amount can be reasonably estimated. If the reasonable estimate of a probable loss is a range, the Company records the most probable estimate of the loss or the minimum amount when no amount within the range is a better estimate than any other amount. The Company discloses a contingent liability even if the liability is not probable or the amount is not estimable, or both, if there is a reasonable possibility that material loss may February 28, 2017,

Note 14 - Fair Value Measuremen

Note 14 - Fair Value Measurements	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Fair Value, Measurement Inputs, Disclosure [Text Block]	14. Fair Value Measurements Assets and liabilities that are measured at fair value on a recurring basis primarily relate to marketable equity securities. These items are marked-to-market at each reporting period. The following tables provide information by level for assets and liabilities that are measured at fair value on a recurring basis: Fair Value Measurements Fair Value as of Level 1 Level 2 Level 3 Available for sale securities $ 748,254 $ 748,254 $ — $ — Fair Value Measurements Fair Value as of Level 1 Level 2 Level 3 Available for sale securities $ 2,243,864 $ 2,243,864 $ — $ — There were no transfers between Level 1, 2, 3 three six February 28, 2017 February 29, 2016.

Note 15 - Supplemental Cash Flo

Note 15 - Supplemental Cash Flow Information	6 Months Ended
	Feb. 28, 2017
Notes to Financial Statements
Cash Flow, Supplemental Disclosures [Text Block]	15. SUPPLEMENTAL CASH FLOW INFORMATION Supplemental disclosures of cash flow information consist of: Three Months Ended February 28, February 29, Cash paid for interest $ 3,470 $ 10,796 Cash paid for income taxes — — Six Months Ended February 28, February 29, Cash paid for interest $ 8,093 $ 15,522 Cash paid for income taxes — —

Note 3 - Inventories (Tables)

Note 3 - Inventories (Tables)	6 Months Ended
	Feb. 28, 2017
Notes Tables
Schedule of Inventory, Current [Table Text Block]	February 28, 2017 August 31, 2016 Production materials $ 1,302,043 $ 1,452,396 Finished goods 6,750,164 6,258,891 $ 8,052,207 $ 7,711,287

Note 4 - Property and Equipme23

Note 4 - Property and Equipment, Net (Tables)	6 Months Ended
	Feb. 28, 2017
Notes Tables
Property, Plant and Equipment [Table Text Block]	February 28, 2017 August 31, 2016 Land $ 310,365 $ 310,365 Buildings and improvements 6,980,663 6,528,252 Machinery and equipment 3,674,867 3,590,063 10,965,895 10,428,680 Less accumulated depreciation (3,480,698 ) (3,152,808 ) $ 7,485,197 $ 7,275,872

Note 5 - Patents and Trademar24

Note 5 - Patents and Trademarks, Net (Tables)	6 Months Ended
	Feb. 28, 2017
Notes Tables
Schedule of Finite-Lived Intangible Assets [Table Text Block]	February 28, 2017 August 31, 2016 Patents and trademarks $ 2,661,393 $ 2,575,435 Less accumulated amortization (1,356,354 ) (1,296,838 ) $ 1,305,039 $ 1,278,597

Note 6 - Investments in Joint25

Note 6 - Investments in Joint Ventures (Tables)	6 Months Ended
	Feb. 28, 2017
Notes Tables
Condensed Balance Sheet [Table Text Block]	As of February 28, 2017 TOTAL EXCOR INDIA FINLAND All Other Current assets $ 51,803,644 $ 25,396,338 $ 4,342,356 $ 1,625,779 $ 20,439,171 Total assets 55,467,386 27,220,507 4,674,322 1,905,434 21,667,123 Current liabilities 13,028,897 3,027,106 1,485,452 484,988 8,031,351 Noncurrent liabilities 107,511 — 3,684 — 103,827 Joint ventures’ equity 42,330,978 24,193,401 3,185,186 1,420,446 13,531,945 Northern Technologies International Corporation’s share of joint ventures’ equity 21,059,113 12,096,702 1,592,593 710,221 6,659,597 Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings $ 18,984,898 $ 12,065,797 $ 727,771 $ 690,221 $ 5,501,109 As of August 31, 2016 TOTAL EXCOR INDIA FINLAND All Other Current assets $ 48,922,924 $ 22,928,810 $ 4,027,016 $ 1,928,861 $ 20,038,237 Total assets 52,407,026 24,733,340 4,352,573 2,211,392 21,109,721 Current liabilities 12,433,700 3,485,213 1,097,231 546,506 7,304,730 Noncurrent liabilities 100,783 — 6,382 — 94,401 Joint ventures’ equity 39,872,543 21,248,109 3,248,960 1,664,886 13,710,588 Northern Technologies International Corporation’s share of joint ventures’ equity 19,840,774 10,624,056 1,624,480 832,442 6,759,796 Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings $ 17,779,912 $ 10,593,151 $ 759,658 $ 812,442 $ 5,614,661 Northern Technologies International Corporation's dividends received from joint ventures $ 5,503,314 $ 4,364,700 $ 326,023 $ 206,516 $ 606,075
Condensed Income Statement [Table Text Block]	Six Months Ended February 28, 2017 Total EXCOR INDIA FINLAND All Other Net sales $ 47,163,046 $ 18,285,432 $ 3,263,830 $ 1,726,555 $ 23,887,229 Gross profit 20,858,536 9,761,696 1,518,122 1,032,318 8,546,400 Net income 5,182,951 4,017,746 192,164 252,140 720,901 Northern Technologies International Corporation’s share of equity in income of joint ventures $ 2,657,143 $ 2,006,441 $ 170,549 $ 126,361 $ 353,792 Northern Technologies International Corporation’s dividends received from joint ventures $ 564,934 $ — $ 206,701 $ 200,768 $ 157,465 Six Months Ended February 29, 2016 Total EXCOR INDIA FINLAND All Other Net sales $ 42,000,424 $ 15,618,735 $ 3,036,404 $ 1,581,287 $ 21,763,999 Gross profit 18,523,102 8,059,186 1,450,777 943,141 8,069,998 Net income 3,872,728 2,960,951 316,292 207,973 387,512 Northern Technologies International Corporation’s share of equity in income of joint ventures 1,936,420 1,480,975 157,474 104,070 193,900 Northern Technologies International Corporation’s dividends received from joint ventures $ 4,054,605 $ 32,523,000 $ 326,023 $ 206,516 $ 269,766

Note 10 - Net Income (Loss) P26

Note 10 - Net Income (Loss) Per Common Share (Tables)	6 Months Ended
	Feb. 28, 2017
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended Six Months Ended Numerators: February 28, February February 28, February Net income (loss) attributable to NTIC $ 386,966 $ (107,789 ) $ 684,605 $ (342,140 ) Denominators: Basic – weighted shares outstanding 4,525,091 4,537,429 4,527,555 4,536,995 Weighted shares assumed upon exercise of stock options 36,933 — 31,930 — Diluted – weighted shares outstanding 4,562,024 4,537,429 4,559,485 4,536,995 Basic income (loss) per share: $ 0.09 $ (0.02 ) $ 0.15 $ (0.08 ) Diluted income (loss) per share: $ 0.09 $ (0.02 ) $ 0.15 $ (0.08 )

Note 11 - Stock-based Compens27

Note 11 - Stock-based Compensation (Tables)	6 Months Ended
	Feb. 28, 2017
Notes Tables
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Six Months Ended February 28, February 29, Dividend yield 0.00 % 0.00 % Expected volatility 46.4 % 46.0 % Expected life of option (in years) 10 10 Average risk-free interest rate 1.63 % 1.63 %

Note 12 - Segment and Geograp28

Note 12 - Segment and Geographic Information (Tables)	6 Months Ended
	Feb. 28, 2017
Notes Tables
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]	Three Months Ended Six Months Ended February 28, February 29, February 28, February 29, ZERUST® net sales $ 7,228,027 $ 6,385,337 $ 15,312,705 $ 12,363,019 Natur-Tec® net sales 1,514,876 1,319,597 3,132,221 2,366,352 Total net sales $ 8,742,903 $ 7,704,934 $ 18,444,926 $ 14,729,371
Reconciliation of Cost of Goods Sold from Segments to Consolidated [Table Text Block]	Three Months Ended Six Months Ended February 28, % of February 29, % of February 28, % of February 29, % of Direct cost of goods sold ZERUST® $ 4,254,524 58.9 % $ 3,576,073 56.0 % $ 8,954,061 58.5 % $ 6,940,628 56.1 % Natur-Tec® 1,068,231 70.5 % 984,938 74.6 % 2,281,399 72.8 % 1,819,197 76.9 % Indirect cost of goods sold 547,431 — 707,213 — 1,247,492 — 1,383,822 — Total net cost of goods sold $ 5,870,186 $ 5,268,224 $ 12,482,952 $ 10,143,647
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	Three Months Ended Six Months Ended February 28, February 29, February 28, February 29, Inside the U.S.A. to unaffiliated customers $ 5,245,092 $ 4,683,208 $ 10,395,832 $ 9,522,987 Outside the U.S.A to: Joint ventures in which the Company is shareholder directly and indirectly 433,317 677,320 1,253,375 1,200,347 Unaffiliated customers 3,064,494 2,344,406 6,795,719 4,006,037 $ 8,742,903 $ 7,704,934 $ 18,444,926 $ 14,729,371
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]	At February 28, At August 31, Brazil $ 63,765 $ 66,938 India 12,027 13,645 Germany 15,512 — China 200,452 253,931 United States 7,193,441 6,941,358 Total long-lived assets $ 7,485,197 $ 7,275,872
Revenue from External Customers by Geographic Areas [Table Text Block]	Six Months Ended February 28, February 29, Brazil $ 1,118,166 $ 997,636 India 733,581 549,402 Germany 217,496 — China 3,296,299 1,439,754 United States 13,079,384 11,742,579 Total net sales $ 18,444,926 $ 14,729,371
Fees for Services Provided to Joint Ventures [Member]
Notes Tables
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]	Three Months Ended February 28, % of Total Fees February 29, % of Total Fees Germany $ 199,509 16.8 % $ 192,869 19.9 % Poland 153,453 13.0 % 145,765 15.0 % Japan 145,722 12.3 % 137,476 14.2 % Thailand 87,627 7.4 % 39,322 4.0 % Korea 86,103 7.3 % 2,500 .3 % France 83,112 7.0 % 73,112 7.5 % Sweden 77,464 6.5 % 50,356 5.2 % Czech Republic 73,286 6.2 % 64,381 6.6 % Finland 66,946 5.7 % 52,896 5.5 % United Kingdom 53,241 4.5 % 64,735 6.7 % India 74,196 6.3 % 72,077 7.4 % Other 83,369 7.0 % 75,553 7.7 % $ 1,184,028 100.0 % $ 971,042 100.0 % Six Months Ended February 28, % of Total Fees February 29, % of Total Fees Germany $ 402,509 16.1 % $ 422,654 17.2 % Poland 302,657 12.1 % 285,023 11.6 % Japan 291,759 11.7 % 268,149 10.9 % Thailand 235,081 9.4 % 263,063 10.7 % Korea 191,481 7.6 % 171,902 7.0 % France 180,785 7.2 % 162,785 6.6 % Sweden 164,525 6.6 % 123,317 5.0 % Czech Republic 144,114 5.8 % 121,933 5.0 % Finland 143,282 5.7 % 121,829 5.0 % United Kingdom 139,372 5.6 % 173,646 7.1 % India 138,731 5.6 % 152,527 6.2 % Other 165,323 6.6 % 189,643 7.7 % $ 2,499,619 100.0 % $ 2,456,471 100.0 %

Note 14 - Fair Value Measurem29

Note 14 - Fair Value Measurements (Tables)	6 Months Ended
	Feb. 28, 2017
Notes Tables
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block]	Fair Value Measurements Fair Value as of Level 1 Level 2 Level 3 Available for sale securities $ 748,254 $ 748,254 $ — $ — Fair Value Measurements Fair Value as of Level 1 Level 2 Level 3 Available for sale securities $ 2,243,864 $ 2,243,864 $ — $ —

Note 15 - Supplemental Cash F30

Note 15 - Supplemental Cash Flow Information (Tables)	6 Months Ended
	Feb. 28, 2017
Notes Tables
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]	Three Months Ended February 28, February 29, Cash paid for interest $ 3,470 $ 10,796 Cash paid for income taxes — — Six Months Ended February 28, February 29, Cash paid for interest $ 8,093 $ 15,522 Cash paid for income taxes — —

Note 3 - Inventories - Inventor

Note 3 - Inventories - Inventories (Details) - USD ($)	Feb. 28, 2017	Aug. 31, 2016
Production materials	$ 1,302,043	$ 1,452,396
Finished goods	6,750,164	6,258,891
Inventories	$ 8,052,207	$ 7,711,287

Note 4 - Property and Equipme32

Note 4 - Property and Equipment, Net - Components of Property and Equipment, Net (Details) - USD ($)	Feb. 28, 2017	Aug. 31, 2016
Land	$ 310,365	$ 310,365
Buildings and improvements	6,980,663	6,528,252
Machinery and equipment	3,674,867	3,590,063
Gross	10,965,895	10,428,680
Less accumulated depreciation	(3,480,698)	(3,152,808)
Net	$ 7,485,197	$ 7,275,872

Note 5 - Patents and Trademar33

Note 5 - Patents and Trademarks, Net (Details Textual) - Patents and Trademarks [Member]	6 Months Ended
	Feb. 28, 2017USD ($)
Finite-Lived Intangible Asset, Useful Life	7 years
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 120,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	120,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	120,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	120,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	$ 120,000

Note 5 - Patents and Trademar34

Note 5 - Patents and Trademarks, Net - Patents and Trademarks, Net (Details) - USD ($)	Feb. 28, 2017	Aug. 31, 2016
Patents and trademarkes, net	$ 1,305,039	$ 1,278,597
Patents and Trademarks [Member]
Patents and trademarks	2,661,393	2,575,435
Less accumulated amortization	(1,356,354)	(1,296,838)
Patents and trademarkes, net	$ 1,305,039	$ 1,278,597

Note 6 - Investments in Joint35

Note 6 - Investments in Joint Ventures (Details Textual) - USD ($) $ in Thousands	6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
Payments to Acquire Interest in Joint Venture	$ 0	$ 0

Note 6 - Investments in Joint36

Note 6 - Investments in Joint Ventures - Condensed Balance Sheet of EXCOR and All Other Joint Ventures (Details) - USD ($)	6 Months Ended		12 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Aug. 31, 2016
Current assets	$ 51,803,644		$ 48,922,924
Total assets	55,467,386		52,407,026
Current liabilities	13,028,897		12,433,700
Noncurrent liabilities	107,511		100,783
Joint ventures’ equity	42,330,978		39,872,543
Northern Technologies International Corporation’s share of joint ventures’ equity	21,059,113		19,840,774
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	18,984,898		17,779,912
Northern Technologies International Corporation's dividends received from joint ventures	564,934	$ 4,054,605	5,503,314
EXCOR [Member]
Current assets	25,396,338		22,928,810
Total assets	27,220,507		24,733,340
Current liabilities	3,027,106		3,485,213
Noncurrent liabilities
Joint ventures’ equity	24,193,401		21,248,109
Northern Technologies International Corporation’s share of joint ventures’ equity	12,096,702		10,624,056
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	12,065,797		10,593,151
Northern Technologies International Corporation's dividends received from joint ventures		32,523,000	4,364,700
Joint Venture in India [Member]
Current assets	4,342,356		4,027,016
Total assets	4,674,322		4,352,573
Current liabilities	1,485,452		1,097,231
Noncurrent liabilities	3,684		6,382
Joint ventures’ equity	3,185,186		3,248,960
Northern Technologies International Corporation’s share of joint ventures’ equity	1,592,593		1,624,480
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	727,771		759,658
Northern Technologies International Corporation's dividends received from joint ventures	206,701	326,023	326,023
Joint Venture in Finland [Member]
Current assets	1,625,779		1,928,861
Total assets	1,905,434		2,211,392
Current liabilities	484,988		546,506
Noncurrent liabilities
Joint ventures’ equity	1,420,446		1,664,886
Northern Technologies International Corporation’s share of joint ventures’ equity	710,221		832,442
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	690,221		812,442
Northern Technologies International Corporation's dividends received from joint ventures	200,768	206,516	206,516
All Other [Member]
Current assets	20,439,171		20,038,237
Total assets	21,667,123		21,109,721
Current liabilities	8,031,351		7,304,730
Noncurrent liabilities	103,827		94,401
Joint ventures’ equity	13,531,945		13,710,588
Northern Technologies International Corporation’s share of joint ventures’ equity	6,659,597		6,759,796
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	5,501,109		5,614,661
Northern Technologies International Corporation's dividends received from joint ventures	$ 157,465	$ 269,766	$ 606,075

Note 6 - Investments in Joint37

Note 6 - Investments in Joint Ventures - Condensed Income Statement of EXCOR and All Other Joint Ventures (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016	Aug. 31, 2016
Net sales			$ 47,163,046	$ 42,000,424
Gross profit			20,858,536	18,523,102
Net income			5,182,951	3,872,728
Northern Technologies International Corporation’s share of equity in income of joint ventures	$ 1,383,139	$ 952,667	2,657,143	1,936,420
Northern Technologies International Corporation’s dividends received from joint ventures			564,934	4,054,605	$ 5,503,314
EXCOR [Member]
Net sales			18,285,432	15,618,735
Gross profit			9,761,696	8,059,186
Net income			4,017,746	2,960,951
Northern Technologies International Corporation’s share of equity in income of joint ventures			2,006,441	1,480,975
Northern Technologies International Corporation’s dividends received from joint ventures				32,523,000	4,364,700
Joint Venture in India [Member]
Net sales			3,263,830	3,036,404
Gross profit			1,518,122	1,450,777
Net income			192,164	316,292
Northern Technologies International Corporation’s share of equity in income of joint ventures			170,549	157,474
Northern Technologies International Corporation’s dividends received from joint ventures			206,701	326,023	326,023
Joint Venture in Finland [Member]
Net sales			1,726,555	1,581,287
Gross profit			1,032,318	943,141
Net income			252,140	207,973
Northern Technologies International Corporation’s share of equity in income of joint ventures			126,361	104,070
Northern Technologies International Corporation’s dividends received from joint ventures			200,768	206,516	206,516
All Other [Member]
Net sales			23,887,229	21,763,999
Gross profit			8,546,400	8,069,998
Net income			720,901	387,512
Northern Technologies International Corporation’s share of equity in income of joint ventures			353,792	193,900
Northern Technologies International Corporation’s dividends received from joint ventures			$ 157,465	$ 269,766	$ 606,075

Note 7 - China Operations (Deta

Note 7 - China Operations (Details Textual)	Aug. 31, 2016USD ($)
Tianjin Zerust [Member]
Cost Method Investments	$ 0

Note 8 - Corporate Debt (Detail

Note 8 - Corporate Debt (Details Textual) - USD ($)	6 Months Ended
	Feb. 28, 2017	Aug. 31, 2016
PNC Bank [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 3,000,000
Long-term Line of Credit	$ 0	$ 0
PNC Bank [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	2.15%
PNC Bank [Member] | Letter of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,200,000
JP Morgan Chase Bank [Member]
Letters of Credit Outstanding, Amount	$ 75,201	$ 71,599

Note 9 - Stockholders' Equity (

Note 9 - Stockholders' Equity (Details Textual) - $ / shares	6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
Stock Repurchased and Retired During Period, Shares	11,475	5,461
Treasury Stock Acquired, Average Cost Per Share	$ 12.92	$ 12.92
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0
The 2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	56,677	53,447
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 13.40	$ 14.85

Note 10 - Net Income (Loss) P41

Note 10 - Net Income (Loss) Per Common Share (Details Textual) - shares	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	275,791		275,791
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	48,067	283,181	48,067

Note 10 - Net Income (Loss) P42

Note 10 - Net Income (Loss) Per Common Share - Reconciliation of the Earnings Per Share Computations (Details) - USD ($)	3 Months Ended			6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2016	Feb. 28, 2017	Feb. 29, 2016
Net income (loss) attributable to NTIC	$ 386,966	$ (107,789)	$ (107,789)	$ 684,605	$ (342,140)
Basic – weighted shares outstanding (in shares)	4,525,091	4,537,429	4,537,429	4,527,555	4,536,995
Weighted shares assumed upon exercise of stock options (in shares)	36,933			31,930
Diluted – weighted shares outstanding (in shares)	4,562,024	4,537,429	4,537,429	4,559,485	4,536,995
Basic income (loss) per share: (in dollars per share)	$ 0.09	$ (0.02)	$ (0.02)	$ 0.15	$ (0.08)
Diluted income (loss) per share: (in dollars per share)	$ 0.09	$ (0.02)	$ (0.02)	$ 0.15	$ (0.08)

Note 11 - Stock-based Compens43

Note 11 - Stock-based Compensation (Details Textual) - USD ($)	6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
Number of Stock-based Compensation Plans	2
Stock or Unit Option Plan Expense	$ 195,832	$ 223,715
Allocated Share-based Compensation Expense, Estimate Remainder of Fiscal Year	195,832
Allocated Share-based Compensation Expense, Estimate, Next Fiscal Year	159,600
Allocated Share-based Compensation Expense, Estimate, Fiscal Year Two	$ 79,800
Estimated Forfeiture Rate for Stock Options	10.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 7.69	$ 8.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	6 years 332 days	6 years 350 days
Net of Estimated Forfeitures [Member]
Allocated Share-based Compensation Expense, Estimate Remainder of Fiscal Year	$ 435,232
The 2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	800,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	56,677	53,447
The 2007 Plan [Member] | One Year after Date of Grant [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
The 2007 Plan [Member] | One Year after Date of Grant [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	100,000
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	90.00%

Note 11 - Stock-based Compens44

Note 11 - Stock-based Compensation - Black-Scholes Option-pricing Model Assumptions (Details)	6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
Dividend yield	0.00%	0.00%
Expected volatility	46.40%	46.00%
Expected life of option (in years) (Year)	10 years	10 years
Average risk-free interest rate	1.63%	1.63%

Note 12 - Segment and Geograp45

Note 12 - Segment and Geographic Information (Details Textual)	6 Months Ended
	Feb. 28, 2017
Number of Reportable Segments	2

Note 12 - Segment and Geograp46

Note 12 - Segment and Geographic Information - Net Sales by Segment (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Net sales by segment	$ 8,742,903	$ 7,704,934	$ 18,444,926	$ 14,729,371
ZERUST [Member]
Net sales by segment	7,228,027	6,385,337	15,312,705	12,363,019
NaturTec [Member]
Net sales by segment	$ 1,514,876	$ 1,319,597	$ 3,132,221	$ 2,366,352

Note 12 - Segment and Geograp47

Note 12 - Segment and Geographic Information - Cost of Goods Sold by Segment (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Cost of goods sold	$ 5,870,186	$ 5,268,224	$ 12,482,952	$ 10,143,647
Precentage of product sales
Direct Cost of Goods Sold [Member] | ZERUST [Member]
Cost of goods sold	$ 4,254,524	$ 3,576,073	$ 8,954,061	$ 6,940,628
Precentage of product sales	58.90%	56.00%	58.50%	56.10%
Direct Cost of Goods Sold [Member] | NaturTec [Member]
Cost of goods sold	$ 1,068,231	$ 984,938	$ 2,281,399	$ 1,819,197
Precentage of product sales	70.50%	74.60%	72.80%	76.90%
Indirect Cost of Goods Sold [Member]
Cost of goods sold	$ 547,431	$ 707,213	$ 1,247,492	$ 1,383,822
Precentage of product sales

Note 12 - Segment and Geograp48

Note 12 - Segment and Geographic Information - Net Sales by Geographic Location (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Net sales by segment	$ 8,742,903	$ 7,704,934	$ 18,444,926	$ 14,729,371
Inside the USA to Unaffiliated Customers [Member]
Net sales by segment	5,245,092	4,683,208	10,395,832	9,522,987
Joint Ventures in Which the Company is a Shareholder Directly and Indirectly Outside the USA [Member]
Net sales by segment	433,317	677,320	1,253,375	1,200,347
Unaffiliated Customers Outside the USA [Member]
Net sales by segment	$ 3,064,494	$ 2,344,406	$ 6,795,719	$ 4,006,037

Note 12 - Segment and Geograp49

Note 12 - Segment and Geographic Information - Fees for Services Provided to Joint Ventures by Geographic Location as a Percentage of Total Fees (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Fees	$ 1,184,028	$ 971,042	$ 2,499,619	$ 2,456,471
Percentage of total fees	100.00%	100.00%	100.00%	100.00%
GERMANY
Fees	$ 199,509	$ 192,869	$ 402,509	$ 422,654
Percentage of total fees	16.80%	19.90%	16.10%	17.20%
POLAND
Fees	$ 153,453	$ 145,765	$ 302,657	$ 285,023
Percentage of total fees	13.00%	15.00%	12.10%	11.60%
JAPAN
Fees	$ 145,722	$ 137,476	$ 291,759	$ 268,149
Percentage of total fees	12.30%	14.20%	11.70%	10.90%
THAILAND
Fees	$ 87,627	$ 39,322	$ 235,081	$ 263,063
Percentage of total fees	7.40%	4.00%	9.40%	10.70%
KOREA, REPUBLIC OF
Fees	$ 86,103	$ 2,500	$ 191,481	$ 171,902
Percentage of total fees	7.30%	0.30%	7.60%	7.00%
FRANCE
Fees	$ 83,112	$ 73,112	$ 180,785	$ 162,785
Percentage of total fees	7.00%	7.50%	7.20%	6.60%
SWEDEN
Fees	$ 77,464	$ 50,356	$ 164,525	$ 123,317
Percentage of total fees	6.50%	5.20%	6.60%	5.00%
CZECH REPUBLIC
Fees	$ 73,286	$ 64,381	$ 144,114	$ 121,933
Percentage of total fees	6.20%	6.60%	5.80%	5.00%
FINLAND
Fees	$ 66,946	$ 52,896	$ 143,282	$ 121,829
Percentage of total fees	5.70%	5.50%	5.70%	5.00%
UNITED KINGDOM
Fees	$ 53,241	$ 64,735	$ 139,372	$ 173,646
Percentage of total fees	4.50%	6.70%	5.60%	7.10%
INDIA
Fees	$ 74,196	$ 72,077	$ 138,731	$ 152,527
Percentage of total fees	6.30%	7.40%	5.60%	6.20%
Other Countries [Member]
Fees	$ 83,369	$ 75,553	$ 165,323	$ 189,643
Percentage of total fees	7.00%	7.70%	6.60%	7.70%

Note 12 - Segment and Geograp50

Note 12 - Segment and Geographic Information - Total Long-lived Assets by Geographic Distribution (Details) - USD ($)	Feb. 28, 2017	Aug. 31, 2016
Total long-lived assets	$ 7,485,197	$ 7,275,872
BRAZIL
Total long-lived assets	63,765	66,938
INDIA
Total long-lived assets	12,027	13,645
GERMANY
Total long-lived assets	15,512
CHINA
Total long-lived assets	200,452	253,931
UNITED STATES
Total long-lived assets	$ 7,193,441	$ 6,941,358

Note 12 - Segment and Geograp51

Note 12 - Segment and Geographical Information - Total Net Sales by Geographic Distribution (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Net sales by segment	$ 8,742,903	$ 7,704,934	$ 18,444,926	$ 14,729,371
BRAZIL
Net sales by segment			1,118,166	997,636
INDIA
Net sales by segment			733,581	549,402
GERMANY
Net sales by segment			217,496
CHINA
Net sales by segment			3,296,299	1,439,754
UNITED STATES
Net sales by segment			$ 13,079,384	$ 11,742,579

Note 13 - Commitments and Con52

Note 13 - Commitments and Contingencies (Details Textual) - USD ($)	6 Months Ended
	Feb. 28, 2017	Aug. 31, 2016	Feb. 29, 2016
Accrued Bonuses	$ 185,000		$ 0
Entity Wide Trade Joint Venture Receivables, Four Joint Ventures,Percentage	57.10%	55.80%
Fiscal 2017 Bonus Plan [Member] | Executive Officer [Member]
Percentage of Individual Bonus Payout Determined by Actual Versus Targeted EBITOI Results	75.00%
Percentage of Individuals Payout Determined Upon Achievement of Certain Pre-Established Individual Performance Objectives	25.00%

Note 14 - Fair Value Measurem53

Note 14 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value Recurring Basis (Details) - USD ($)	Feb. 28, 2017	Aug. 31, 2016
Available for sale securities	$ 748,254	$ 2,243,864
Fair Value, Inputs, Level 1 [Member]
Available for sale securities	748,254	2,243,864
Fair Value, Inputs, Level 2 [Member]
Available for sale securities
Fair Value, Inputs, Level 3 [Member]
Available for sale securities

Note 15 - Supplemental Cash F54

Note 15 - Supplemental Cash Flow Information - Supplemental Disclosures of Cash Flow Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Cash paid for interest	$ 3,470	$ 10,796	$ 8,093	$ 15,522
Cash paid for income taxes