10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

______________________________

FORM 10-Q

(Mark one)

[x] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended February 28, 2013

[  ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ________________ to __________________.

Commission File Number:  001-11038

____________________

NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION

(Exact name of registrant as specified in its charter)

Delaware (State or other jurisdiction of incorporation or organization)	41-0857886 (I.R.S. Employer Identification No.)
4201 Woodland Road Circle Pines, Minnesota  55014 (Address of principal executive offices) (Zip code)

(763) 225-6600

(Registrant’s telephone number including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  YES [x]    NO [ ]

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  YES [x]    NO [ ]

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer [ ]	Accelerated filer [ ]
Non-accelerated filer (Do not check if a smaller reporting company) [ ]	Smaller reporting company [x]

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    YES [ ]   NO [x]

As of April 12, 2013, there were 4,421,870 shares of common stock of the registrant outstanding.

NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION

FORM 10-Q

February 28, 2013

TABLE OF CONTENTS

Description		Page
PART I.	FINANCIAL INFORMATION
Item 1.	Financial Statements
	Consolidated Balance Sheets as of February 28, 2013 (unaudited) and August 31, 2012	3
	Consolidated Statements of Operations (unaudited) for the Three and Six Months Ended February 28, 2013 and February 29, 2012	4
	Consolidated Statements of Comprehensive Income (unaudited) for the Three and Six Months Ended February 28, 2013 and February 29, 2012	5
	Consolidated Statements of Cash Flows (unaudited) for the Six Months Ended February 28, 2013 and February 29, 2012	6
	Notes to Consolidated Financial Statements (unaudited)	7-17
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results  of Operations	18-31
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	31
Item 4.	Controls and Procedures	31
PART II.	OTHER INFORMATION
Item 1.	Legal Proceedings	32
Item 1A.	Risk Factors	32
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	32
Item 3.	Defaults Upon Senior Securities	32
Item 4.	Mine Safety Disclosures	32
Item 5.	Other Information	32
Item 6.	Exhibits	32-33
SIGNATURE PAGE		34
EXHIBIT INDEX		35

_________________

This quarterly report on Form 10-Q contains certain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and are subject to the safe harbor created by those sections.  For more information, see “Part I. Financial Information – Item 2.  Management’s Discussion and Analysis of Financial Condition and Results of Operations– Forward-Looking Statements.”

1

_________________

As used in this report, references to “NTIC,” the “Company,” “we,” “our” or “us,” unless the context otherwise requires, refer to Northern Technologies International Corporation and its wholly owned subsidiaries, NTI Facilities, Inc. and Northern Technologies Holding Company, LLC, and its majority owned subsidiaries, Zerust Prevenção de Corrosão S.A. and NTI Asean LLC, all of which are consolidated on NTIC’s consolidated financial statements.

NTIC’s consolidated financial statements do not include the accounts of any of its joint ventures.  Except as otherwise indicated, references in this report to NTIC’s joint ventures do not include NTIC’s majority owned Brazilian subsidiary, Zerust Prevenção de Corrosão S.A., or NTIC’s majority owned subsidiary, NTI Asean LLC, which is a holding company that holds investments in eight entities that operate in the Association of Southeast Asian Nations (ASEAN) region, including the following countries:   China, Indonesia, Korea, Malaysia, Philippines, Singapore, Taiwan and Thailand.

As used in this report, references to “Zerust Brazil” refer to NTIC’s majority owned Brazilian subsidiary, Zerust Prevenção de Corrosão S.A.

As used in this report, references to “NTI Asean” refer to NTIC’s majority owned holding company subsidiary,  NTI Asean LLC.

As used in this report, references to “HNTI” refer to NTIC’s joint venture in India, Harita NTI Limited.

As used in this report, references to “EXCOR” refer to NTIC’s primary joint venture in Germany, Excor Korrosionsschutz – Technologien und Produkte GmbH.

All trademarks, trade names or service marks referred to in this report are the property of their respective owners.

2

PART I - FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS AS OF FEBRUARY 28, 2013 (UNAUDITED)

AND AUGUST 31, 2012 (AUDITED)

	February 28, 2013		August 31, 2012
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	4,261,145	$	4,137,547
Receivables:
Trade excluding joint ventures, less allowance for doubtful accounts of $20,000 at February 28, 2013 and August 31, 2012		2,752,750		2,516,961
Trade joint ventures		982,009		734,543
Fees for services provided to joint ventures		2,437,920		1,316,933
Income taxes		109,677		58,129
Inventories		5,153,531		4,151,197
Prepaid expenses		640,286		548,331
Deferred income taxes		596,085		596,085
Total current assets		16,933,403		14,059,726
PROPERTY AND EQUIPMENT, NET		4,182,735		4,288,618
OTHER ASSETS:
Investments in joint ventures		22,189,562		21,461,492
Deferred income taxes		1,030,610		1,030,610
Patents and trademarks, net		1,027,097		961,181
Other		76,000		76,000
Total other assets		24,323,269		23,529,283
Total assets	$	45,439,407	$	41,877,627
LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Current portion of note payable		77,090		76,120
Accounts payable		1,254,432		1,818,309
Accrued liabilities:
Payroll and related benefits		623,830		1,565,866
Deferred joint venture royalties		288,000		288,000
Other		100,484		251,350
Total current liabilities		2,343,836		3,999,645
NOTE PAYABLE, NET OF CURRENT PORTION (Note 7)		894,384		933,413
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 4,418,821 and 4,403,656, respectively		88,376		88,073
Additional paid-in capital		11,399,966		11,130,966
Retained earnings		26,084,067		25,260,034
Accumulated other comprehensive income		618,099		277,583
Stockholders’ equity		38,190,508		36,756,656
Non-controlling interest		4,010,679		187,913
Total equity		42,201,187		36,944,569
Total liabilities and equity	$	45,439,407	$	41,877,627

See notes to consolidated financial statements.

3

NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)

FOR THE THREE AND SIX MONTHS ENDED FEBRUARY 28, 2013 AND FEBRUARY 29, 2012

	Three Months Ended						Six Months Ended
	February 28, 2013			February 29, 2012			February 28, 2013			February 29, 2012
NET SALES:
Net sales, excluding joint ventures	$	4,485,203		$	4,125,618		$	9,255,590		$	8,403,261
Net sales, to joint ventures		761,147			848,710			1,282,507			1,403,181
Total net sales		5,246,350			4,974,328			10,538,097			9,806,442
Cost of goods sold		3,633,913			3,480,082			7,324,885			6,689,558
Gross profit		1,612,437			1,494,246			3,213,212			3,116,884
JOINT VENTURE OPERATIONS:
Equity in income of joint ventures		1,138,438			1,224,675			2,292,734			2,582,355
Fees for services provided to joint ventures		1,770,881			1,298,126			3,617,158			2,743,378
Total joint venture operations		2,909,319			2,522,801			5,909,892			5,325,733
OPERATING EXPENSES:
Selling expenses		1,174,065			1,014,082			2,345,160			2,122,568
General and administrative expenses		1,143,987			1,100,812			2,392,683			2,370,825
Expenses incurred in support of joint ventures		321,456			235,557			691,143			435,821
Research and development expenses		912,393			974,777			1,850,599			1,789,082
Total operating expenses		3,551,901			3,325,228			7,279,585			6,718,296
OPERATING INCOME		969,855			691,819			1,843,519			1,724,321
INTEREST INCOME		22,288			12,631			47,634			20,691
INTEREST EXPENSE		(6,988	)		(7,284	)		(13,462	)		(13,250	)
OTHER INCOME		—			6,825			—			13,650
INCOME BEFORE INCOME TAX EXPENSE		985,155			703,991			1,877,691			1,745,412
INCOME TAX EXPENSE		240,000			100,000			374,000			206,000
NET INCOME		745,155			603,991			1,503,691			1,539,412
NET INCOME ATTRIBUTABLE TO NON CONTROLLING INTEREST		310,745			(2,202	)		679,659			(25,538	)
NET INCOME ATTRIBUTABLE TO NTIC	$	434,410		$	606,193		$	824,032		$	1,564,950
NET INCOME PER COMMON SHARE:
Basic	$	0.10		$	0.14		$	0.19		$	0.36
Diluted	$	0.10		$	0.14		$	0.18		$	0.35
WEIGHTED AVERAGE COMMON SHARES ASSUMED OUTSTANDING:
Basic		4,418,821			4,398,356			4,409,954			4,366,932
Diluted		4,485,076			4,466,435			4,460,197			4,440,001

See notes to consolidated financial statements.

4

NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)

FOR THE THREE AND SIX MONTHS ENDED FEBRUARY 28, 2013 AND FEBRUARY 29, 2012

	Three Months Ended						Six Months Ended
	February 28, 2013			February 29, 2012			February 28, 2013		February 29, 2012
NET INCOME	$	745,155		$	603,991		$	1,503,691	$	1,539,412
OTHER COMPREHENSIVE INCOME (LOSS)      –  FOREIGN CURRENCY TRANSLATION    ADJUSTMENT		(25,641	)		(65,805	)		395,544		(1,253,876	)
COMPREHENSIVE INCOME (LOSS)		719,514			538,186			1,899,235		285,536
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTERESTS		331,252			300			734,687		(32,842	)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO STOCKHOLDERS	$	388,262		$	537,886		$	1,164,548	$	318,378

See notes to consolidated financial statements.

5

NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

FOR THE SIX MONTHS ENDED FEBRUARY 28, 2013 AND FEBRUARY 29, 2012

	Six Months Ended
	February 28,  2013			February 29,  2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$	1,503,691		$	1,539,412
Adjustments to reconcile net income to net cash used in operating activities:
Expensing of fair value of stock options vested		137,550			145,046
Depreciation expense		211,874			163,171
Amortization expense		35,122			77,493
Loss on disposal of assets		13,845			—
Equity in income from joint ventures		(2,292,734	)		(2,582,355	)
Changes in current assets and liabilities:
Receivables:
Trade, excluding joint ventures		(223,731	)		(290,512	)
Trade, joint ventures		(247,466	)		(316,174	)
Fees for services receivables, joint ventures		221,099			164,795
Income taxes		(51,111	)		(822	)
Inventories		(990,720	)		(111,041	)
Prepaid expenses and other		(91,869	)		(425,711	)
Accounts payable		(574,037	)		(902,749	)
Income tax payable		(2,748	)		(51,921	)
Accrued liabilities		(1,094,446	)		(198,639	)
Net cash used in operating activities		(3,445,681	)		(2,790,007	)
CASH FLOWS FROM INVESTING ACTIVITIES:
Investments in joint ventures		—			—
Dividends received from joint ventures		2,953,435			3,036,344
Additions to property and equipment		(102,259	)		(80,698	)
Effect of NTI Asean consolidation on cash (Note 2)		1,612,768			—
Additions to patents		(114,882	)		(85,176	)
Net cash provided by investing activities		4,349,062			2,870,470
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of note payable		(38,059	)		(38,059	)
Dividend received by non-controlling interest		(872,841	)		—
Proceeds from employee stock purchase plan		28,938			22,414
Proceeds from exercise of stock options		102,815			15,040
Net cash provided by financing activities		(779,147	)		(605	)
EFFECT OF EXCHANGE RATE CHANGES ON CASH:		(636	)		(10,422	)
NET  INCREASE IN CASH AND CASH EQUIVALENTS		123,598			69,436
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD		4,137,547			3,266,362
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$	4,261,145		$	3,335,798

See notes to consolidated financial statements.

6

NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

1.           INTERIM FINANCIAL INFORMATION

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, 2013 and August 31, 2012 and the results of their operations for the three and six months ended February 28, 2013 and February 29, 2012 and their cash flows for the six months ended February 28, 2013 and February 29, 2012, in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP).

Certain amounts reported in the consolidated financial statements for the previous reporting periods have been reclassified to conform to the current period presentation.  These reclassifications did not have a material impact on the Company’s previously reported consolidated balance sheets or statements of cash flows.

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-K for the fiscal year ended August 31, 2012.  These consolidated financial statements also should be read in conjunction with the “Management’s Discussion and Analysis of Financial Condition and Results of Operations” section appearing in this report.

Operating results for the three and six months ended February 28, 2013 are not necessarily indicative of the results that may be expected for the full fiscal year ending August 31, 2013.

The Company evaluates events occurring after the date of the consolidated financial statements requiring recording or disclosure in the consolidated financial statements.

2.           NTI ASEAN

NTI Asean LLC (NTI Asean) is an entity that holds investments in eight entities operating in the Association of Southeast Asian Nations (ASEAN) region, including the following countries: China, Indonesia, Korea, Malaysia, Philippines, Singapore, Taiwan and Thailand.

Prior to September 1, 2012, the Company owned 50% of NTI Asean, which it considered to be less than a majority, of the equity and voting rights and accounted for its investment using the equity method.  On September 1, 2012, the Company obtained an additional 10% ownership interest in NTI Asean in exchange for a license agreement, and thereafter holds 60% of the equity and voting rights of NTI Asean.

The Company accounted for the transaction resulting in the additional ownership as a business combination.  Beginning in the first quarter of fiscal 2013, the Company consolidated the results of NTI Asean.  Immediately prior to the transaction, the Company re-measured the fair value of NTI Asean and determined that there was no difference between the fair value and the book value of the entity.  As a result, there was no accounting impact related to the business combination in the consolidated statements of operations.

The Company determined the fair value of NTI Asean using the capitalized income method, including a capitalization rate of 25%.  The allocation of the total transaction amount was as follow:

Net assets acquired (liabilities assumed):
Cash and cash equivalents	$	1,613,000
Accounts receivables		1,342,000
Investments in joint ventures		4,967,000
Value of assets	$	7,922,000
Purchase price:
Fair value of non-controlling interest	$	3,961,000
Value of previously held interest		3,961,000
Total consideration	$	7,922,000

7

The following is a summary of certain line items of the Company’s consolidated statement of operations for the three months ended February 29, 2012 as reported and on a pro forma basis, assuming the consolidation of NTI Asean on the Company’s consolidated financial statements as of the beginning of such period:

				NTI			Eliminated in
	As Reported			Asean			Consolidation			Pro Forma
Net sales	$	4,974,328		$	—		$	—		$	4,974,328
Cost of goods sold		3,480,082			—			—			3,480,082
Gross profit		1,494,246			—			—			1,494,246
Joint venture operations		2,522,801			868,382			(322,654	)		3,068,529
Operating expenses		3,325,228			20,470			—			3,345,698
Operating income		691,819			847,912			(322,654	)		1,217,077
Income before income tax expense		703,991			847,912			(322,654	)		1,229,249
Income tax expense		100,000			95,500			—			195,500
Net income		603,991			752,412			(322,654	)		1,033,749
Net income attributable to non-controlling interest		(2,202	)		(300,965	)		—			(303,167	)
Net income attributable to NTIC		606,193			451,447			(322,654	)		734,804
Net income per common diluted share	$	0.13		$	0.10		$	(0.08	)	$	0.16

The following is a summary of certain line items of the Company’s consolidated statements of operations for the six months ended February 29, 2012 as reported and on a pro forma basis, assuming the consolidation of NTI Asean on the Company’s consolidated financial statements as of the beginning of such period:

				NTI			Eliminated in
	As Reported			Asean			Consolidation			Pro Forma
Net sales	$	9,806,442		$	—		$	—		$	9,806,442
Cost of goods sold		6,689,558			—			—			6,689,558
Gross profit		3,116,884			—			—			3,116,884
Joint venture operations		5,325,733			1,699,280			(692,115	)		6,332,898
Operating expenses		6,718,296			23,135			—			6,741,431
Operating income		1,724,321			1,676,145			(692,115	)		2,708,351
Income before income tax expense		1,745,412			1,676,145			(692,115	)		2,729,442
Income tax expense		206,000			184,811			—			390,811
Net income		1,539,412			1,491,334			(692,115	)		2,338,631
Net income attributable to non-controlling interest		(25,538	)		(596,534	)		—			(622,072	)
Net income attributable to NTIC		1,564,950			894,800			(692,115	)		1,767,635
Net income per common diluted share	$	0.35		$	0.20		$	(0.16	)	$	0.40

3.           INVENTORIES

Inventories consisted of the following:

	February 28, 2013		August 31, 2012
Production materials	$	952,997	$	1,462,615
Finished goods		4,200,534		2,688,582
	$	5,153,531	$	4,151,197

8

4.           PROPERTY AND EQUIPMENT, NET

Property and equipment, net consisted of the following:

	February 28, 2013			August 31, 2012
Land	$	310,365		$	310,365
Buildings and improvements		3,556,041			3,406,674
Machinery and equipment		2,861,709			2,908,021
		6,728,115			6,625,060
Less accumulated depreciation		(2,545,380	)		(2,336,442	)
	$	4,182,735		$	4,288,618

5.           PATENTS AND TRADEMARKS, NET

Patents and trademarks, net consisted of the following:

	February 28, 2013			August 31, 2012
Patents and trademarks	$	2,045,102		$	1,945,785
Less accumulated amortization		(1,018,005	)		(984,604	)
	$	1,027,097		$	961,181

Patent and trademark costs are amortized over seven years.  Costs incurred related to patents and trademarks are capitalized until filed and approved, at which time the amounts capitalized to date are amortized and any further costs, including maintenance costs, are expensed as incurred.  Amortization expense is estimated to approximate $80,000 in each of the next five fiscal years.

6.           INVESTMENTS IN JOINT VENTURES

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 approximate U.S. GAAP in all material respects.  All material profits recorded on sales from the Company to its joint ventures of goods that remain in inventory, have been eliminated for financial reporting purposes.

Financial information from the audited and unaudited financial statements of the Company’s joint venture in Germany, Excor Korrosionsschutz – Technologien und Produkte GmbH (EXCOR), China, NTI Asean and all of the Company’s other joint ventures, are summarized as follows:

	At February 28, 2013
	Total		EXCOR		China		All Other
Current assets	$	61,997,739	$	22,196,110	$	12,442,364	$	27,359,265
Total assets		68,522,275		24,625,927		12,474,170		31,422,178
Current liabilities		19,532,691		3,848,126		5,094,516		10,590,049
Noncurrent liabilities		4,210,364		—		856,978		3,353,386
Joint ventures’ equity		44,779,219		20,777,801		6,522,675		17,478,742
Northern Technologies International Corporation’s share of joint ventures’ equity		22,189,562		10,388,902		3,261,338		8,539,322
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	$	20,075,092	$	10,357,997	$	3,215,436	$	6,501,659

9

	At August 31, 2012
	Total		EXCOR		NTI ASEAN		All Other
Current assets	$	61,973,725	$	24,357,139	$	15,358,967	$	22,257,619
Total assets		68,585,974		26,620,589		15,522,456		26,442,929
Current liabilities		18,686,181		4,749,574		5,763,857		8,172,750
Noncurrent liabilities		4,700,458		—		1,055965		3,644,493
Joint ventures’ equity		45,199,335		21,871,015		8,702,634		14,625,686
Northern Technologies International Corporation’s share of joint ventures’ equity		21,461,492		10,935,509	$	3,685,404		6,840,579
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	$	19,403,150	$	10,904,604	$	3,314,445	$	5,184,101

	Six Months Ended February 28, 2013
	Total		EXCOR		China		All Other
Net sales	$	54,247,135	$	17,451,153	$	6,929,260	$	29,866,722
Gross profit		25,852,537		9,105,579		3,290,660		13,456,298
Net income		4,728,680		3,260,575		524,546		943,559
Northern Technologies International Corporation’s share of equity in income of joint ventures	$	2,292,734	$	1,631,125	$	262,148	$	399,461

	Six Months Ended February 29, 2012
	Total		EXCOR		NTI ASEAN		All Other
Net sales	$	54,792,662	$	16,958,519	$	10,482,144	$	27,351,999
Gross profit		25,945,925		8,860,381		4,705,397		12,380,147
Net income		4,798,435		3,158,682		1,276,056		363,697
Northern Technologies International Corporation’s share of equity in income of joint ventures	$	2,582,355	$	1,576,496	$	692,115	$	313,744

*Prior to September 1, 2012, the Company owned 50% of NTI Asean, which included the joint venture in China, and disclosed its financial information accordingly. On September 1, 2012, the Company obtained an additional 10% ownership interest in NTI Asean and has consolidated the results of NTI Asean subsequent to that date.  As a result the Company now discloses the financial information for only its joint venture in China and not all of NTI Asean accordingly.

The Company records expenses that are directly attributable to the joint ventures on the consolidated statements of operations on the line “Expenses incurred in support of joint ventures”.  The expenses include items such as employee compensation and benefit expenses, travel expense and consulting expense.

The Company did not make any other joint venture investments during the six months ended February 28, 2013 and February 29, 2012.

7.           CORPORATE DEBT

As of February 28, 2013, Northern Technologies Holding Company, LLC (NTI LLC) had a term loan with a principal amount of $971,474 outstanding that NTI LLC obtained from PNC Bank, National Association (PNC Bank) in connection with the purchase of NTIC’s corporate headquarters in September 2006.  The term loan matures on January 10, 2016, bears interest at an annual rate based on the daily LIBOR rate plus 2.15% and is payable in consecutive monthly installments equal to approximately $6,343 (inclusive of principal but exclusive of interest).  The term loan is secured by a first lien on the real estate and building owned by NTI LLC and all of the assets of the Company and is guaranteed by the  Company.

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The Company has a revolving line of credit with PNC Bank of $3,000,000.  No amounts were outstanding under the line of credit as of February 28, 2013 and August 31, 2012.  At the option of the Company, outstanding advances under the line of credit bear interest at either (a) an annual rate based on LIBOR plus 2.15% for the applicable LIBOR interest period selected by the Company or (b) at the rate publicly announced by PNC Bank from time to time as its prime rate. Interest is payable in arrears (a) for the portion of advances bearing interest under the prime rate on the last day of each month during the term thereof and (b) for the portion of advances bearing interest under the LIBOR option on the last day of the respective LIBOR interest period selected for such advance.  Any unpaid interest is payable on the maturity date.  As of February 28, 2013, the interest rate was 2.93% and the weighted average rate was 3.04% for the six months ended February 28, 2013.  As of February 29, 2012, the interest rate was 3.24% and the weighted average rate was 3.13% for the six months ended February 29, 2012.  The revolving line of credit is secured by cash, receivables and inventory.

The term loan and the line of credit are governed under separate loan agreements (collectively, the Loan Agreements).  The Loan Agreements contain standard covenants, including affirmative financial covenants, such as the maintenance of a minimum fixed charge coverage ratio, and negative covenants, which, among other things, limit the incurrence of additional indebtedness, loans and equity investments, disposition of assets, mergers and consolidations and other matters customarily restricted in such agreements. Under the Loan Agreements, the Company is subject to a minimum fixed charge coverage ratio of 1.10:1.00.  As of February 28, 2013, the Company was in compliance with all debt covenants.

On December 11, 2012, PNC Bank extended the maturity date of the line of credit from January 9, 2013 to January 8, 2014, and waived a technical covenant default by the Company to deliver quarterly compliance certificates.  All other terms of the line of credit and the loan agreement and other documents evidencing the line of credit remain the same.

8.           STOCKHOLDERS’ EQUITY

During the six months ended February 28, 2013, the Company did not purchase or retire any shares of its common stock.  The following stock options to purchase shares of common stock were exercised during the six months ended February 28, 2013:

Options Exercised	Exercise Price
25,140	$9.95
1,734	7.65

The Company granted stock options under the Northern Technologies International Corporation Amended and Restated 2007 Stock Incentive Plan (the 2007 Plan) to purchase an aggregate of 118,294 shares of its common stock to various employees and directors during the six months ended February 28, 2013.  The weighted average per share exercise price of the stock options is $10.25, which is equal to the fair market value of the Company’s common stock on the date of grant.

During the six months ended February 29, 2012, the Company did not purchase or retire any shares of its common stock.  The following stock options to purchase shares of common stock were exercised during the six months ended February 29, 2012:

Options Exercised	Exercise Price
1,966	$           7.65

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The Company granted stock options under the 2007 Plan to purchase an aggregate of 26,000 shares of its common stock to various employees and directors during the six months ended February 29, 2012.  The weighted average per share exercise price of the stock options is $16.45, which is equal to the fair market value of the Company’s common stock on the date of grant.

During the six months ended February 29, 2012, the Company paid stock bonuses under the 2007 Plan for an aggregate of 42,707 shares of its common stock to various employees at a grant price of $14.42 per share.  The aggregate fair value of the shares of the Company’s common stock as of the date of payment of the stock bonuses was $615,830, based on the closing sale price of a share of the Company’s common stock on the date of payment. The fair value of common stock granted during the six months ended February 29, 2012 was based on fiscal 2011 performance and was included in accrued liabilities at August 31, 2011.

9.           NET INCOME PER COMMON SHARE

Basic net income per common share is computed by dividing net income 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.

Options to purchase shares of common stock of 48,000 were excluded from the computation of common share equivalents for the three and six months ended February 28, 2013, as the exercise prices of such options were greater than market price of a share of common stock.  Options to purchase shares of common stock of 26,000 were excluded from the computation of common share equivalents for the three and six months ended February 29, 2012, as the exercise prices of such options were greater than market price of a share of common stock.

The following is a reconciliation of the earnings per share computation for the three and six months ended February 28, 2013 and February 29, 2012:

	Three Months Ended				Six Months Ended
Numerators:	February 28, 2013		February 29, 2012		February 28, 2013		February 29, 2012
Net income attributable to NTIC	$	434,410	$	606,193	$	824,032	$	1,564,950
Denominator:
Basic – weighted shares outstanding		4,418,821		4,398,356		4,409,954		4,366,932
Weighted shares assumed upon exercise of stock options		66,255		68,079		50,243		73,069
Diluted – weighted shares outstanding		4,485,076		4,466,435		4,460,197		4,440,001
Basic earnings per share:	$	0.10	$	0.14	$	0.19	$	0.36
Diluted earnings per share:	$	0.10	$	0.14	$	0.18	$	0.35

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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.

10.           STOCK-BASED COMPENSATION

The Company has two stock-based compensation plans under which stock options and other stock-based awards have been granted, including the Northern Technologies International Corporation Amended and Restated 2007 Stock Incentive Plan and the Northern Technologies International Corporation Employee Stock Purchase Plan (the ESPP).  The Compensation Committee of the Board of Directors and the Board of Directors administers these plans.

The 2007 Plan provides for the grant of incentive stock options, non-statutory stock options, stock appreciation rights, restricted stock, stock unit awards, performance awards and stock bonuses to eligible recipients to enable the Company and its subsidiaries to attract and retain qualified individuals through opportunities for equity participation in the Company, and to reward those individuals who contribute to the achievement of the Company’s economic objectives.  Subject to adjustment as provided in the 2007 Plan, up to a maximum of 800,000 shares of the Company’s common stock are issuable under the 2007 Plan.  Options granted under the 2007 Plan generally have a term of five years and become exercisable over a three- or four-year period beginning on the one-year anniversary of the date of grant.  Options are granted at per share exercise prices equal to the market value of the Company’s common stock on the date of grant.  To date, only stock options and stock bonuses have been granted under the 2007 Plan.

The maximum number of shares of common stock of the Company available for issuance under the ESPP is 100,000 shares, subject to adjustment as provided in the ESPP.  The ESPP provides for six-month offering periods beginning on September 1 and March 1 of each year.  The purchase price of the shares is 90% of the lower of the fair market value of common stock at the beginning or end of the offering period.  This discount may not exceed the maximum discount rate permitted for plans of this type under Section 423 of the Internal Revenue Code of 1986, as amended.  The ESPP is compensatory for financial reporting purposes.

The Company granted options to purchase an aggregate of 118,294 and 26,000 shares of its common stock during the six months ended February 28, 2013 and February 29, 2012, respectively.  The fair value of option grants is determined at date of grant, using the Black-Scholes option pricing model with the assumptions listed below.  Based on these valuations, the Company recognized compensation expense of $137,550 and $145,046 during the six months ended February 28, 2013 and February 29, 2012, respectively, related to the options that vested during such time period.  The stock-based expense recorded reduced after-tax net income per share by $0.03 for each of the six months ended February 28, 2013 and February 29, 2012, respectively.  As of February 28, 2013, the total compensation cost for non-vested options not yet recognized in the Company’s consolidated statements of operations was $478,992 net of estimated forfeitures.  Additional stock-based compensation expense of $173,220 is expected through the remainder of fiscal year 2013, and expense of $185,815 and $99,964 is expected to be recognized during fiscal 2014 and fiscal 2015, respectively.  Future option grants will impact the compensation expense recognized.

The Company currently estimates a ten percent forfeiture rate for stock options and continually reviews this estimate for future periods.

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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:

	February 28, 2013			February 29, 2012
Dividend yield		0.00%			0.00	%
Expected volatility		48.0%			48.8	%
Expected life of option (years)	5	-	10		5
Average risk-free interest rate		0.71%			1.31	%

The weighted average per share fair value of options granted during six months ended February 28, 2013 and February 29, 2012 was $5.53 and $7.14, respectively.  The weighted average remaining contractual life of the options outstanding as of February 28, 2013 and February 29, 2012 was 4.58 years and 2.07 years, respectively.

11.           GEOGRAPHIC AND SEGMENT INFORMATION

Net sales by geographic location as a percentage of total consolidated net sales for the three and six months ended February 28, 2013 and February 29, 2012 were as follows:

	Three Months Ended						Six Months Ended
	February 28, 2013			February 29, 2012			February 28, 2013			February 29, 2012
Inside the U.S.A. to unaffiliated customers		65.6	%		58.9	%		68.4	%		63.3	%
Outside the U.S.A to:
Joint ventures in which the Company is a shareholder directly and indirectly		18.2	%		11.9	%		16.8	%		13.7	%
Unaffiliated customers		16.2	%		29.2	%		14.8	%		23.0	%
		100.0	%		100.0	%		100.0	%		100.0	%

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 months ended February 28, 2013 and February 29, 2012 were as follows:

	Three Months Ended
	February 28, 2013		% of Total Fees for Services Provided to Joint Ventures			February 29, 2012		% of Total Fees for Services Provided to Joint Ventures
China*	$	450,586		25.4	%	$	—		0.0	%
Germany		249,513		14.1	%		251,387		19.4	%
Japan		169,205		9.6	%		214,984		16.6	%
Poland		154,839		8.7	%		130,470		10.1	%
Thailand*		148,303		8.4	%		—		0.0	%
France		147,896		8.3	%		127,004		9.8	%
Korea**		123,388		7.0	%		532		0.0	%
Sweden		77,627		4.4	%		148,277		11.4	%
Finland		72,329		4.1	%		118,911		9.2	%
United Kingdom		35,754		2.0	%		80,639		6.2	%
India		—		0.0	%		163,689		12.6	%
Other		141,441		8.0	%		62,233		4.8	%
	$	1,770,881		100.0	%	$	1,298,126		100.0	%

_______________

*  Joint venture owned by NTI Asean.

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** Joint venture owned by NTI Asean as of February 28, 2013, but not as of February 29, 2012.  NTI Asean results are not included on the consolidated financial statements for the three months ended February 29, 2012. (See Note 2)

	Six Months Ended
	February 28, 2013		% of Total Fees for Services Provided to Joint Ventures			February 29, 2012		% of Total Fees for Services Provided to Joint Ventures
China*	$	943,897		26.1	%	$	—		0.0	%
Germany		492,213		13.6	%		500,833		18.3	%
Japan		371,186		10.3	%		503,522		18.4	%
Thailand*		301,989		8.4	%		—		0.0	%
France		276,398		7.6	%		268,643		9.8	%
Poland		266,311		7.4	%		228,298		8.3	%
Korea**		262,131		7.2	%		76,997		2.8	%
Sweden		164,619		4.6	%		304,934		11.1	%
Finland		160,180		4.4	%		251,407		9.2	%
United Kingdom		102,812		2.8	%		160,138		5.8	%
India		—		0.0	%		299,844		10.9	%
Other		275,422		7.6	%		148,762		5.4	%
	$	3,617,158		100.0	%	$	2,743,378		100.0	%

________________

*  Joint venture owned by NTI Asean.

** Joint venture owned by NTI Asean as of February 28, 2013, but not as of February 29, 2012.  NTI Asean results are not included on the consolidated financial statements for the six months ended February 29, 2012. (See Note 2)

The following table sets forth the Company’s net sales for the three and six months ended February 28, 2013 and February 29, 2012 by segment:

	Three Months Ended				Six Months Ended
	February 28, 2013		February 29, 2012		February 28, 2013		February 29, 2012
ZERUST® sales	$	4,710,412	$	4,570,779	$	9,505,695	$	9,023,425
Natur-Tec™ sales		535,938		403,549		1,032,402		783,017
	$	5,246,350	$	4,974,328	$	10,538,097	$	9,806,442

The following table sets forth the Company’s cost of goods sold for the three and six months ended February 28, 2013 and February 29, 2012 by segment:

	Three Months Ended										Six Months Ended
	February 28, 2013		% of Product Sales*			February 29, 2012		% of Product Sales*			February 28, 2013		% of Product Sales*			February 29, 2012		% of Product Sales*
Direct cost of goods sold
ZERUST®	$	2,623,070		55.7	%	$	2,569,588		56.2	%	$	5,267,365		55.4	%	$	5,027,387		55.7	%
Natur-Tec®		453,147		84.6	%		361,704		89.6	%		892,820		86.5	%		658,265		84.1	%
Indirect cost of goods sold		557,696		—			548,790		—			1,164,700		—			1,003,906		—
Total net cost of goods sold	$	3,633,913				$	3,480,082				$	7,324,885				$	6,689,558

______________

* 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’s management 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.

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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, 2013
	Brazil		North America		Total
Total assets	$	1,456,793	$	43,982,614	$	45,439,407

	At August 31, 2012
	Brazil		North America		Total
Total assets	$	1,744,693	$	40,132,934	$	41,877,627

	Six Months Ended February 28, 2013
	Brazil			North America		Total
Net sales	$	1,131,469		$	9,406,628	$	10,538,097
Operating income	$	(106,759	)	$	1,950,278	$	1,843,519

	Six Months Ended February 29, 2012
	Brazil			North America		Total
Net sales	$	1,216,532		$	8,589,910	$	9,806,442
Operating income	$	(173,651	)	$	1,897,972	$	1,724,321

Total assets located in Brazil primarily consist of cash and cash equivalents, customer receivables and inventory.  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.

12.           RESEARCH AND DEVELOPMENT

The Company expenses all costs related to product research and development as incurred.   The Company incurred $1,850,599 and $1,789,082 of expense during the six months ended February 28, 2013 and February 29, 2012, respectively, in connection with its research and development activities.  These costs related to product research and development are net of reimbursements related to certain research and development contracts of $137,364 and $228,576 for the six months ended February 28, 2013 and February 29, 2012, respectively.  The net fees are accounted for in the “Research and Development Expenses” section of the consolidated statements of operations.

The Company has certain research and development contracts.  The Company accrues proceeds received under such contracts and offsets research and development expenses incurred in equal installments over the timelines associated with completion of the contracts’ specific objectives and milestones. At February 28, 2013, the Company had $85,418 as a receivable, and as of August 31, 2012, the Company had $96,861 of deferred amounts in other accrued liabilities as the Company had not yet performed under the obligations of the contract at that time.

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13.           COMMITMENTS AND CONTINGENCIES

On August 31, 2012, the Board of Directors of the Company, upon recommendation of the Compensation Committee of the Board of Directors, approved the material terms of an annual bonus plan for the Company’s executive officers and certain officers and employees for the fiscal year ending August 31, 2013.  For fiscal 2013 as in past years, the total amount available under the bonus plan will be up to 25% of the Company’s earnings before interest, taxes and other income, as adjusted to take into account amounts to be paid under the bonus plan and certain other adjustments (Adjusted EBITOI), assuming the achievement of at least a minimum Adjusted EBITOI, which is generally 70% of a budgeted target Adjusted EBITOI for fiscal 2013.  For each plan participant, 50% of the amount of the participant’s individual bonus payout will be determined based upon the participant’s individual allocation percentage of the total amount available under the bonus plan and 50% of the participant’s payout will be determined based upon the participant’s achievement of certain pre-established but more qualitative individual performance objectives.  The payment of bonuses under the plan are discretionary and may be paid to executive officer participants in both cash and shares of NTIC common stock, the exact amount and percentages of which will be determined by the Company’s Board of Directors, upon recommendation of the Compensation Committee, after the completion of the Company’s consolidated financial statements for fiscal 2013.  There was $275,000 for management bonuses accrued for six months ended February 28, 2013 compared to a management bonus accrual of $542,720 for the six months ended February 29, 2012.

The Company leases property with future lease payments as follows: fiscal 2013 - $119,250; fiscal 2014 - $59,500 and thereafter - $0.

Three joint ventures accounted for 54.2% and 55.3% of the Company’s trade joint venture receivables at February 28, 2013 and August 31, 2012, respectively.

From time to time, the Company is subject to various claims and legal actions in the ordinary course of its business.  The Company is not currently involved in any legal proceeding in which the Company believes, based on information currently available, that there is a reasonable possibility of a material loss.

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ITEM 2.MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This Management’s Discussion and Analysis provides material historical and prospective disclosures intended to enable investors and other users to assess NTIC’s financial condition and results of operations.  Statements that are not historical are forward-looking and involve risks and uncertainties discussed under the heading “Part I. Item 2.  Management’s Discussion and Analysis of Financial Condition and Results of Operations—Forward-Looking Statements.” The following discussion of the results of the operations and financial condition of NTIC should be read in conjunction with NTIC’s consolidated financial statements and the related notes thereto included under the heading “Part I. Item 1.  Financial Statements.”

Business Overview

NTIC develops and markets proprietary environmentally beneficial products and services in over 55 countries either directly or via a network of majority owned subsidiaries, joint ventures, independent distributors and agents.  NTIC’s primary business is corrosion prevention marketed mainly under the ZERUST® brand.  NTIC has been selling its proprietary ZERUST® rust and corrosion inhibiting products and services to the automotive, electronics, electrical, mechanical, military and retail consumer markets for over 35 years, and more recently, has targeted and expanded into the oil and gas industry.  NTIC also sells a portfolio of bio-based and biodegradable (compostable) polymer resin compounds and finished products marketed under the Natur-Tec® brand.  These products are intended to reduce NTIC’s customers’ carbon footprint and provide environmentally sound disposal options.

NTIC’s ZERUST® rust and corrosion inhibiting products include plastic and paper packaging, liquids and coatings, rust removers and cleaners, diffusers and variations of these products designed specifically for the oil and gas industry.   NTIC’s also offers worldwide on-site technical consulting for rust and corrosion prevention issues.  NTIC’s technical service consultants work directly with the end users of NTIC’s ZERUST® rust and corrosion inhibiting products to analyze their specific needs and develop systems to meet their technical requirements.  In North America, NTIC sells its ZERUST® corrosion prevention solutions through a direct sales force as well as a network of independent distributors and agents.  Internationally, NTIC sells its ZERUST® corrosion prevention solutions through its majority owned Brazilian subsidiary, Zerust Prevenção de Corrosão S.A. (Zerust Brazil), its majority owned joint venture holding company for NTIC’s joint venture investments in the Association of Southeast Asian Nations (ASEAN) region, NTI Asian LLC (NTI Asean), and joint venture arrangements in North America and Europe.

One of NTIC’s strategic initiatives is to expand into and penetrate other markets for its ZERUST® corrosion prevention solutions.  For the past several years, NTIC has focused its sales and marketing efforts on the oil and gas industry since the infrastructure that supports that industry is typically constructed using metals that are highly susceptible to corrosion and NTIC believes that its ZERUST® corrosion prevention solutions will minimize maintenance downtime on critical oil and gas industry infrastructure, extend the life of such infrastructure and reduce the risk of environmental pollution due to corrosion leaks.

Petroleo Brasileiro S.A. (Petrobras), an oil company located in Brazil, has conducted extensive multi-year product field trials of NTIC’s ZERUST® rust and corrosion inhibiting products against competitive alternatives.  During fiscal 2010, Zerust Brazil received a Phase 1 contract for an initial implementation of $1.4 million in ZERUST® products which was delivered in fiscal 2010 and fiscal 2011.  During fiscal 2011, Zerust Brazil signed a Phase 2 contract with Petrobras to supply $2.4 million in ZERUST® products.  During fiscal 2012, Petrobras expanded this Phase 2 contract to supply an additional $657,000 in ZERUST® products, bringing the total Phase 2 contract value to $3.1 million in ZERUST® products, which were delivered in fiscal 2012.  During first quarter of fiscal 2013, Zerust Brazil signed a Phase 3 contract with Petrobras to supply $3.7 million in ZERUST® products. While NTIC initially had anticipated that Petrobras would fulfill this Phase 3 contract in one large order prior to the end of fiscal 2013, based on NTIC’s recent discussions with Petrobras, NTIC believes that Petrobras intends to place a larger number of smaller orders during the remainder of fiscal 2013 and fiscal 2014, rather than one large order prior to the end of fiscal 2013 as NTIC previously had anticipated.

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NTIC is also pursuing opportunities to market its ZERUST® rust and corrosion prevention solutions to other targeted potential customers in the oil and gas industry across several geographies through NTIC’s joint venture partners as well as other strategic partners.  NTIC believes that sales of its ZERUST® corrosion prevention solutions to customers in the oil and gas industry require long sales cycles that include trial periods of at least one year with each customer, followed by a slow integration process thereafter.

Natur-Tec® bio-based and biodegradable plastics are manufactured using NTIC’s patented and/or proprietary technologies and are intended to replace conventional petroleum-based plastics.  The Natur-Tec® biopolymer resin compound portfolio include formulations that have been optimized for a variety of applications including blown-film extrusion, extrusion coating, injection molding, and engineered plastics. These resin compounds are fully biodegradable in a composting environment and are currently being used to produce finished products including shopping and grocery bags, lawn and leaf bags, can liners, pet waste collection bags, cutlery, packaging foam and coated paper products,.  In North America, NTIC markets its Natur-Tec® resin compounds and finished products primarily through a network of regional and national distributors as well as independent agents.  NTIC continues to see significant opportunities for finished bioplastic products and, therefore, continues to strengthen and expand its North American distribution network for finished Natur-Tec® bioplastic products. Internationally, NTIC sells its Natur-Tec® resin compounds and finished products both directly and through some of its joint ventures.

During fiscal 2012, NTIC’s joint venture in India, Harita NTI Limited (HNTI) entered into an agreement to supply a major global apparel brand compostable packaging for branded garments. HNTI is also pursuing bioplastic opportunities in food and personal care product packaging. During fiscal 2011, NTIC entered into an agreement with Italy-based Naturfuels s.r.l. to distribute its Natur-Tec® bioplastic materials and products in the Italian market.  Under the terms of the distribution agreement, NTIC supplies Naturfuels with patented high-strength Natur-Tec® film grade resin compounds suited to producing  compostable shopping and garbage bags on conventional plastic film production equipment. In 2011, the Italian government passed legislation banning the use of non-biodegradable disposable plastic shopping bags. However, enforcement of this law was delayed to allow Italian bag manufacturers to exhaust their current supply of conventional polyolefinic resins.  Consequently, significant sales of these to Natur-Tec® film grade resin compounds to Naturfuels are not expected until fiscal 2014.

NTIC’s Joint Venture Network

NTIC participates in 23 active joint venture arrangements in North America, Europe and Asia.  Each of these joint ventures generally manufactures and markets products in the geographic territory to which it is assigned.  While most of NTIC’s joint ventures exclusively sell rust and corrosion inhibiting products, some of the joint ventures sell NTIC’s Natur-Tec® resin compounds.  NTIC historically has funded its investments in joint ventures with cash generated from operations.

NTIC’s receipt of funds from its joint ventures is dependent upon fees for services that NTIC provides to its joint ventures, based primarily on the revenues of the joint ventures, and NTIC’s receipt of dividend distributions from the joint ventures.  NTIC receives fees for services provided to its joint ventures based primarily on the net sales of the individual joint ventures.  The fees for services provided to joint ventures are determined based on either a flat fee or a percentage of sales depending on local laws and tax regulations.  With respect to NTIC’s primary joint venture in Germany (EXCOR), NTIC recognizes an agreed upon quarterly fee for such services.  NTIC recognizes equity income from its joint ventures based on the overall profitability of its joint ventures. Such profitability is subject to variability from quarter to quarter which, in turn, subjects NTIC’s earnings to variability from quarter to quarter.  The profits of NTIC’s joint ventures are shared by the respective joint venture owners in accordance with their respective ownership percentages.  NTIC typically owns only 50% or less of each of its joint venture entities and thus does not control the decisions of these entities regarding whether to pay dividends and, if paid, how much they should be in a given year.  The payment of a dividend by an entity is determined by a joint vote of the owners and is not at the sole discretion of NTIC.

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NTIC does not consolidate the results of its 23 joint ventures in its consolidated financial statements.  NTIC’s investments in its joint ventures are accounted for using the equity method.

Zerust Brazil’s results are consolidated in NTIC’s consolidated financial statements.  NTIC holds 85% of the equity and 85% of the voting rights of Zerust Brazil.

In addition, beginning in the first quarter of fiscal 2013, NTIC has consolidated the results of NTI Asean, which effective as of September 1, 2012 is a majority owned subsidiary of NTIC.   On September 1, 2012, NTIC and the other 50% owner in NTI Asean contributed their respective shares of capital stock of Korea Zerust Co., Ltd. (Korea Zerust), constituting an aggregate of 50% of the equity and voting rights of Korea Zerust, to NTI Asean, and NTIC contributed exclusive license rights and other intellectual property to NTI Asean in exchange for an additional 10% ownership interest in NTI Asean.  As a result of the transaction, NTIC holds 60% of the equity and 60% of the voting rights of NTI Asean.  NTI Asean holds investments in eight entities that operate in the following eight territories located in the ASEAN region:  China, Indonesia, Korea, Malaysia, Philippines, Singapore, Taiwan and Thailand.  With respect to NTIC’s joint ventures, NTIC considers EXCOR and China to be individually significant to NTIC’s consolidated assets and income; and therefore, provides certain additional information regarding EXCOR and China in the notes to NTIC’s consolidated financial statements and in this section of this report.

Financial Overview

NTIC’s management, including its chief executive officer who is NTIC’s chief operating decision maker, reports and manages NTIC’s operations in two reportable business segments based on products sold, customer base and distribution center:  ZERUST® products and services and Natur-Tec® products.

NTIC’s consolidated net sales increased 5.5% and 7.5% during the three and six months ended February 28, 2013, respectively, compared to the three and six months ended February 29, 2012.  These increases were primarily a result of increased demand for Natur-Tec® products and ZERUST® rust and corrosion inhibiting packaging products and services.  During the three and six months ended February 28, 2013, 89.8% and 90.2% of NTIC’s consolidated net sales, respectively, were derived from sales of ZERUST® products and services, which increased 3.1% and 5.3% to $4,710,412 and $9,505,695 during the three and six months ended February 28, 2013, respectively, compared to $4,570,779 and $9,023,425 during the three and six months ended February 29, 2012, respectively, due to increased demand from both new and existing customers.  NTIC has strategically focused its sales efforts for ZERUST® products and services on customers with sizeable corrosion problems in sectors, including the oil and gas, that offer sizable growth opportunities.  NTIC’s consolidated net sales for the three and six months ended February 28, 2013 included $579,655 and $1,131,469, respectively, of sales made by Zerust Brazil, and of those sales, $149,257 and $189,642, respectively, in sales were made to the oil and gas industry in Brazil.  Overall demand for ZERUST® products and services depends heavily on the overall health of the markets in which NTIC sells its products, including in particular the automotive market.

During the three and six months ended February 28, 2013, 10.2% and 9.8%, of NTIC’s consolidated net sales were derived from sales of Natur-Tec® products compared to 8.1% and 8.0% during the three and six months ended February 29, 2012, respectively.  Net sales of Natur-Tec® products increased 32.8% and 31.8% during the three and six months ended February 28, 2013 compared to the three and six months ended February 29, 2012.  These increases were due to increased sales to Natur-Tec® expanding industrial distributor base in the United States.  Additionally, NTIC continues to target key regional and national retailers through independent sales agents.  Demand for the Natur-Tec® products depends primarily on market acceptance and the reach of NTIC’s distribution network.

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Cost of goods sold as a percentage of net sales decreased to 69.3% during the three months ended February 28, 2013 compared to 70.0% during the three months ended February 28, 2013 primarily as a result of slightly decreased production expense associated with the production and shipping of both ZERUST® and Natur Tec® products.  Cost of goods sold as a percentage of net sales increased slightly to 69.5% during the six months ended February 28, 2013 compared to 68.2% during the six months ended February 29, 2012 primarily as a result of increased production expenses associated with the production and shipping of both ZERUST® and Natur Tec® products.  The increase in production expenses for the six month comparison is considered temporary as new suppliers are ramping up for new products and applications.

NTIC’s equity in income of joint ventures decreased 7.0% and 11.2% to $1,138,438 and $2,292,734, respectively, during the three and six months ended February 28, 2013 compared to $1,224,675 and $2,582,355 during the three and six months ended February 29, 2012, which was primarily a result of the consolidation of NTI Asean which was included in the current fiscal year periods, but not in the prior fiscal year periods.

NTIC recognized a 36.4% and 31.9% increase in fees for services provided to joint ventures during the three and six months ended February 28, 2013 compared to the three and six months ended February 29, 2012, respectively.  These increases were primarily a result of the consolidation of fees for services earned by NTI Asean which are included in the current fiscal year periods, but not in the prior fiscal year periods.  Fees for services provided are a function of the net sales of NTIC’s joint ventures which were $26,722,201 and $54,247,135 during the three and six months ended February 28, 2013 compared to $25,997,430 and $54,792,662 for the three and six months ended February 29, 2012.  Total net sales of NTIC’s joint ventures were adversely affected in part by the European economic slowdown, which NTIC believes adversely affected the net sales of NTIC’s European joint ventures as well as certain of NTIC’s other non-European joint ventures, and the weakening of the EURO and other currencies compared to the U.S. dollar.

NTIC’s total operating expenses increased 8.4%, or $561,289, to $7,279,585 during the six months ended February 28, 2013 compared to the six months ended February 29, 2012.  These increases were primarily the result of increases in selling expenses, general and administrative expenses and expenses incurred in support of joint ventures, research and development expenses, and overall reflected NTIC’s efforts to support its new business efforts.

NTIC expenses all costs related to product research and development as incurred.  NTIC incurred $1,850,599 and $1,789,082 of expense during the six months ended February 28, 2013 and February 29, 2012, respectively, in connection with its research and development activities.  These represent net amounts after being reduced by reimbursements related to certain research and development contracts.  Such reimbursements totaled $137,364 and $228,576 for the six months ended February 28, 2013 and February 29, 2012, respectively.  NTIC anticipates that it will spend between $3,800,000 and $4,000,000 in total during fiscal 2013 on research and development activities related to its new technologies.  This estimate is a net range after being reduced by anticipated reimbursements related to certain research and development contracts.

Net income attributable to NTIC decreased 28.3%, to $434,410, or $0.10 per diluted common share, for the three months ended February 28, 2013 compared to $606,193, or $0.14 per diluted common share, for the three months ended February 29, 2012.  Net income attributable to NTIC decreased 47.3%, to $824,032, or $0.18 per diluted common share, for the six months ended February 28, 2013 compared to $1,564,950, or $0.35 per diluted common share, for the six months ended February 29, 2012.  These decreases were primarily the result of increases in operating expenses and income taxes.  NTIC anticipates that its quarterly net income will remain subject to significant volatility primarily due to the sales performance of its joint ventures, sales of its ZERUST® products and services into the oil and gas industry, and sales of Natur-Tec® bioplastics products. Each of these fluctuates more on a quarterly basis than the traditional ZERUST® business in North America.

NTIC’s working capital was $14,589,567 at February 28, 2013, including $4,261,145 in cash and cash equivalents compared to $10,060,081 at August 31, 2012, including $4,137,547 in cash and cash equivalents.

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Results of Operations

The following tables set forth NTIC’s results of operations for the three and six months ended February 28, 2013 and February 29, 2012.

	Three Months Ended
	February 28, 2013		% of Net Sales			February 29, 2012		% of Net Sales			$ Change			% Change
Net sales, excluding joint ventures	$	4,485,203		85.5	%	$	4,125,618		82.9	%	$	359,585			8.7	%
Net sales, to joint ventures		761,147		14.5	%		848,710		17.1	%		(87,563	)		(10.3	%)
Cost of goods sold		3,633,913		69.3	%		3,480,082		70.0	%		153,831			4.4	%
Equity in income of joint ventures		1,138,438		21.7	%		1,224,675		24.6	%		(86,237	)		(7.0	%)
Fees for services provided to joint ventures		1,770,881		33.8	%		1,298,126		26.1	%		472,755			36.4	%
Selling expenses		1,174,065		22.4	%		1,014,082		20.4	%		159,983			15.8	%
General and administrative expenses		1,143,987		21.8	%		1,100,812		22.1	%		43,175			3.9	%
Expenses incurred in support of joint ventures		321,456		6.1	%		235,557		4.7	%		85,899			36.5	%
Research and development expenses		912,393		17.4	%		974,777		19.6	%		(62,384	)		(6.4	%)

	Six Months Ended
	February 28, 2013		% of Net Sales			February 29, 2012		% of Net Sales			$ Change			% Change
Net sales, excluding joint ventures	$	9,255,590		87.8	%	$	8,403,261		85.7	%	$	852,329			10.1	%
Net sales, to joint ventures		1,282,507		12.2	%		1,403,181		14.3	%		(120,674	)		(8.6	%)
Cost of goods sold		7,324,885		69.5	%		6,689,558		68.2	%		635,327			9.5	%
Equity in income of joint ventures		2,292,734		21.8	%		2,582,355		26.3	%		(289,621	)		(11.2	%)
Fees for services provided to joint ventures		3,617,158		34.3	%		2,743,378		28.0	%		873,780			31.9	%
Selling expenses		2,345,160		22.3	%		2,122,568		21.6	%		222,592			10.5	%
General and administrative expenses		2,392,683		22.7	%		2,370,825		24.2	%		21,858			0.9	%
Expenses incurred in support of joint ventures		691,143		6.6	%		435,821		4.4	%		255,322			58.6	%
Research and development expenses		1,850,599		17.6	%		1,789,082		18.2	%		61,517			3.4	%

Net Sales. NTIC’s consolidated net sales increased 5.5% and 7.5% to $5,246,350 and $10,538,097, respectively, during the three and six months ended February 28, 2013 compared to the three and six months ended February 29, 2012.  NTIC’s consolidated net sales to unaffiliated customers excluding NTIC’s joint ventures increased 8.7% and 10.1% to $4,485,203 and $9,255,590, respectively, during the three and six months ended February 28, 2013 compared to the same respective prior year periods.  These increases were primarily a result of increased demand and sales of Natur-Tec® products and ZERUST® rust and corrosion inhibiting packaging products and services.  Net sales to joint ventures decreased 10.3% and 8.6% to $761,147 and $1,282,507 during the three and six months ended February 28, 2013, respectively, compared to the same respective prior year periods.  These decreases were primarily due to timing differences with orders placed with our joint ventures.

The following table sets forth NTIC’s net sales by product category for the three and six months ended February 28, 2013 and February 29, 2012 by segment:

	Three Months Ended				Six Months Ended
	February 28, 2013		February 29, 2012		February 28, 2013		February 29, 2012
ZERUST® sales	$	4,710,412	$	4,570,779	$	9,505,695	$	9,023,425
Natur-Tec® sales		535,938		403,549		1,032,402		783,017
Total net sales	$	5,246,350	$	4,974,328	$	10,538,097	$	9,806,442

During the three and six months ended February 28, 2013, 89.8% and 90.2% of NTIC’s consolidated net sales, respectively, were derived from sales of ZERUST® products and services, which increased 3.1% and 5.3% to $4,710,412 and $9,505,695 during the three and six months ended February 28, 2013, respectively, compared to $4,570,779 and $9,023,425 during the three and six months ended February 29, 2012, respectively, due to increased demand from existing customers and the addition of new customers.  NTIC has strategically focused its sales efforts for ZERUST® products and services on customers with sizeable corrosion problems in sectors , including the oil and gas, that offer sizable growth opportunities.

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NTIC’s consolidated net sales during the three and six months ended February 28, 2013 included $579,655 and $1,131,469 respectively, of sales made by Zerust Brazil, and of those sales, $149,257 and $189,642, respectively, in sales were made to the oil and gas industry sector in Brazil.

During the three and six months ended February 28, 2013, 10.2% and 9.8% of NTIC’s consolidated net sales, respectively, were derived from sales of Natur-Tec® products, which increased 32.8% and 31.8% to $535,938 and $1,032,402 during the three and six months ended February 28, 2013, respectively, compared to the three and six months ended February 29, 2012.  These increases were due to increased sales to the growing network of Natur-Tec® distributors in the United States.  Additionally, NTIC continues to target key regional and national retailers utilizing independent sales agents.  Demand for the Natur-Tec® products depends primarily on market acceptance and the reach of NTIC’s distribution network.

Cost of Goods Sold.  Cost of goods sold increased 4.4% and 9.5% for the three and six months ended February 28, 2013, respectively, compared to the three and six months ended February 29, 2012 primarily as a result of increased net sales as described above, as well as for the six month comparison, a slight increase in production and shipping costs associated with ZERUST® products.  Cost of goods sold as a percentage of net sales decreased to 69.3% during the three months ended February 28, 2013 compared to 70.0% the three months ended February 29, 2012 primarily as a result of slightly decreased production expense associated with the production and shipping of both ZERUST® and Natur Tec® products during the three months then ended.  Cost of goods sold as a percentage of net sales increased slightly to 68.5% during the six months ended February 28, 2013 compared to 68.2% during the six months ended February 29, 2012 primarily as a result of increased production expenses associated with the production and shipping of both ZERUST® and Natur Tec® products.  The increase in production expenses for the six month comparison is considered temporary as new suppliers are ramping up for new products and applications.

Equity in Income of Joint Ventures. NTIC’s equity in income of joint ventures decreased 7.0% and 11.2% to $1,138,438 and $2,292,734 during the three and six months ended February 28, 2013, respectively, compared to equity in income of joint ventures of $1,224,675 and $2,582,355 during the three and six months ended February 29, 2012, respectively, primarily as a result of the consolidation of NTI Asean in the current fiscal year periods, but not in the prior fiscal year periods. Of the total equity in income of joint ventures, NTIC had equity in income of joint ventures of $1,631,125 attributable to EXCOR during the six months ended February 28, 2013 compared to $1,576,496 attributable to EXCOR during the six months ended February 29, 2012.  Of the total equity in income of joint ventures, NTIC had equity in income of joint ventures of $262,148 attributable to NTIC’s joint venture in China during the six months ended February 28, 2013 compared to $248,322 attributable to NTIC’s joint venture in China during the six months ended February 29, 2012.  NTIC had equity in income of all other joint ventures of $399,461 during the six months ended February 28, 2013 compared to $757,537 during the six months ended February 29, 2012.

Fees for Services Provided to Joint Ventures.  NTIC recognized fee income for services provided to joint ventures of $1,770,881 and $3,617,158 during the three and six months ended February 28, 2013, respectively, compared to $1,298,126 and $2,743,378 during the three and six months ended February 29, 2012, respectively, representing an increase of 36.4% and 31.9%, respectively.  These increases were primarily a result of the consolidation of the fees for services earned by NTI Asean which are included in the current fiscal year periods, but not in the prior fiscal year periods.  Fee income for services provided to joint ventures are a function of the sales made by the various joint ventures of $26,722,201 and $54,247,135 during the three and six months ended February 28, 2013 compared to $25,997,430 and $54,792,662 for the three and six months ended February 29, 2012, respectively.  Total net sales of NTIC’s joint ventures were adversely affected in part by the European economic slowdown, which NTIC believes also adversely affected net sales of certain of NTIC’s other non-European joint ventures, as well as the weakening of the EURO and other currencies compared to the U.S. dollar.  Sales of NTIC’s joint ventures are not included in NTIC’s product sales and are not combined with NTIC’s sales in NTIC’s consolidated financial statements or in any description of NTIC’s sales.

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Of the total fee income for services provided to joint ventures, fees of $492,213 were attributable to EXCOR during the six months ended February 28, 2013 compared to $500,833 attributable to EXCOR during the six months ended February 29, 2012.  This decrease was primarily the result of foreign currency exchange rate fluctuations.  Fees of $943,897 were attributable to NTIC’s joint venture in China during the six months ended February 28, 2013 compared to $0 during the six months ended February 29, 2012, as a result of the consolidation of NTI Asean in the current fiscal year periods, but not in the prior fiscal year periods.

Selling Expenses.  NTIC’s selling expenses increased 15.8% and 10.5% for the three and six months ended February 28, 2013 compared to the same respective periods in fiscal 2012 due to increases in compensation and employee benefits, lab testing related expenses, commission expenses, travel and related expenses, and consulting expenses and selling expenses incurred at Zerust Brazil.  Selling expenses as a percentage of net sales increased slightly to 22.4% and 22.3% for the three and six months ended February 28, 2013, from 20.4% and 21.6% and during the three and six months ended February 29, 2012, due primarily to the increase in selling expenses, partially offset by the increase in net sales, as previously described.

General and Administrative Expenses.  NTIC’s general and administrative expenses increased 3.9% and 0.9% for the three and six months ended February 28, 2013 compared to the same respective periods in fiscal 2012 due to increases in consulting expenses.  As a percentage of net sales, general and administrative expenses decreased to 21.8% and 22.7% for the three and six months ended February 28, 2013 from 22.1% and 24.2% for the three and six months ended February 29, 2012.

Expenses Incurred in Support of Joint Ventures.  Expenses incurred in support of NTIC’s joint ventures were $321,456 and $691,143 during the three and six months ended February 28, 2013, respectively, compared to $235,557 and $435,821 during the three and six months ended February 29, 2012, respectively, representing an increase of 36.5% and 58.6%, respectively.  These increases were due primarily to increased compensation and benefits expenses associated with increased headcount.

Research and Development Expenses.  NTIC’s research and development expenses decreased 6.4% for the three months ended February 28, 2013 compared to the same period in fiscal 2012 and increased 3.4% for the six months ended February 28, 2013 compared to the same period in fiscal 2012.

Interest Income.  NTIC’s interest income increased to $22,288 and $47,634 during the three and six months ended February 28, 2013, respectively, compared to $12,631 and $20,691 during the three and six months ended February 29, 2012, respectively, primarily due to increased cash balances in Brazil earning interest during the most recent periods.

Interest Expense.  NTIC’s interest expense decreased to $6,988 during the three months ended February 28, 2013 compared to $7,284 during the three months ended February 29, 2012, primarily due to lower average outstanding debt levels during the most recent period. NTIC’s interest expense increased slightly to $13,462 during the six months ended February 28, 2013 compared to $13,250 during the months ended February 29, 2012.

Income Before Income Tax Expense.  Income before income tax expense increased to $985,155 and $1,877,691 for the three and six months ended February 28, 2013, respectively, compared to $703,991 and $1,745,412 for the three and six months ended February 29, 2012, respectively.

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Income Tax Expense.  Income tax expense was $240,000 and $374,000 during the three and six months ended February 28, 2013, respectively, compared $100,000 and $206,000 during the three and six months ended February 29, 2012, respectively.  Income tax expense was calculated based on management’s estimate of NTIC’s annual effective income tax rate.  NTIC’s annual effective income tax rate during the three and six months ended February 28, 2013 and February 29, 2012 was lower than the statutory rate primarily due to NTIC’s equity in income of joint ventures being recognized based on after-tax earnings of these entities.  To the extent undistributed earnings of NTIC’s joint ventures are distributed to NTIC, it is not expected to result in any material additional income tax liability after the application of foreign tax credits. NTIC records a tax valuation allowance when it is more likely than not that some portion or all of its deferred tax assets will not be realized to reduce deferred tax assets to the amount expected to be realized.  NTIC determined based on all available evidence, including historical data and projections of future results, that it is more likely than not that all of its deferred tax assets, except for its foreign tax credit carryforwards and Minnesota state research and development credit carryforwards, will be fully realized.  In addition, NTIC determined based upon all available evidence, including new IRS guidance, historical results, projected future taxable income and foreign tax credit utilization, that it was not more likely than not that the federal research and development credits would be utilized during the carryforward period and as a result, a valuation allowance was recorded against all of NTIC’s federal research and development credits.  In addition, NTIC continues to believe that its deferred tax asset related to foreign tax credit carryforwards will not be realized due to insufficient federal taxable income within the carryforward period and the fact that for ordering purposes the foreign tax credit carryforwards are not allowed to be used until after any current year foreign tax credits are utilized.

NTIC considers the earnings of certain foreign joint ventures to be indefinitely invested outside the United States on the basis of estimates that future domestic cash generation will be sufficient to meet future domestic cash needs. As a result, U.S. income and foreign withholding taxes have not been recognized on the cumulative undistributed earnings of $20.1 million and $19.4 million at February 28, 2013 and August 31, 2012, respectively.  To the extent undistributed earnings of NTIC’s joint ventures are distributed in the future, they are not expected to result in any material additional income tax liability after the application of foreign tax credits

Other Comprehensive Income - Foreign Currency Translations Adjustment.  The volatility of the foreign currency translations adjustment was due to the volatility of the U.S. dollar compared to the Euro and other foreign currencies during the three and six months ended February 28, 2013 compared to the same respective periods in fiscal 2012.

Liquidity and Capital Resources

Sources of Cash and Working Capital.  As of February 28, 2013, NTIC’s working capital was $14,589,567, including $4,261,145 in cash and cash equivalents, compared to working capital of $10,060,081, including $4,137,547 in cash and cash equivalents, at August 31, 2012.

As of February 28, 2013, NTIC had a term loan with a principal amount of $971,474 outstanding that Northern Technologies Holding Company, LLC (NTI LLC) obtained from PNC Bank, National Association (PNC Bank) in connection with the purchase of NTIC’s corporate headquarters in September 2006.  The term loan matures on January 10, 2016, bears interest at an annual rate based on the daily LIBOR rate plus 2.15% and is payable in consecutive monthly installments equal to $6,343 (inclusive of principal but exclusive of interest).  The term loan is secured by a first lien on the real estate and building owned by NTI LLC and all of the assets of NTIC and is guaranteed by NTIC.

As of February 28, 2013, NTIC also had a revolving line of credit with PNC Bank of $3,000,000 with no amounts outstanding as of such date.  The line of credit is evidenced by an amended and restated committed line of credit note in the principal amount of up to $3,000,000.  The line of credit has a $1,200,000 standby letter of credit subfacility, with any standby letters of credit issued thereunder being at the sole discretion of PNC Bank.  Any standby letters of credit issued under the subfacility are subject to customary fees and charges payable by NTIC.  At the option of NTIC, outstanding advances under the line of credit bear interest at either (a) an annual rate based on LIBOR plus 2.15% for the applicable LIBOR interest period selected by NTIC or (b) at the rate publicly announced by PNC Bank from time to time as its prime rate.  Interest is payable in arrears (a) for the portion of advances bearing interest under the prime rate on the last day of each month during the term thereof and (b) for the portion of advances bearing interest under the LIBOR option on the last day of the respective LIBOR interest period selected for such advance.  Any unpaid interest is payable on the maturity date.  As of February 28, 2013, the interest rate on the line of credit was 2.93%.

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The term loan and the line of credit are governed under two separate loan agreements.  The loan agreements contain standard covenants, including affirmative financial covenants, such as the maintenance of a minimum fixed charge coverage ratio, and negative covenants, which, among other things, limit the incurrence of additional indebtedness, loans and equity investments, disposition of assets, mergers and consolidations and other matters customarily restricted in such agreements. Under the loan agreements, NTIC is subject to a minimum fixed charge coverage ratio of 1.10:1.00.

On December 11, 2012, PNC Bank extended the maturity date of the line of credit from January 9, 2013 to January 8, 2014 and waived a technical covenant default by NTIC to deliver quarterly compliance certificates.  All other terms of the line of credit and the loan agreement and other documents evidencing the line of credit remain the same.  NTIC expects to remain in compliance with all loan agreement covenants during the remainder of fiscal 2013.

NTIC believes that a combination of its existing cash and cash equivalents, forecasted cash flows from future operations, anticipated distributions of earnings, anticipated fees to NTIC for services provided to its joint ventures, and funds available through existing or anticipated financing arrangements, will be adequate to fund its existing operations, investments in new or existing joint ventures, capital expenditures, debt repayments and any stock repurchases for at least the next 12 months.  During the remainder of fiscal 2013, NTIC expects to continue to invest in research and development and in marketing efforts and resources into the application of its corrosion prevention technology into the oil and gas industry and its Natur-Tec® bio-plastics business.  In order to take advantage of such new product and market opportunities to expand its business and increase its revenues, NTIC may decide to finance such opportunities by borrowing under its revolving line of credit or raising additional financing through the issuance of debt or equity securities.  There is no assurance that any financing transaction will be available on terms acceptable to NTIC or at all, or that any financing transaction will not be dilutive to NTIC’s current stockholders.

NTIC traditionally has used the cash generated from its operations, distributions of earnings and fees for services provided to its joint ventures to fund NTIC’s new technology investments and capital contributions to new and existing joint ventures.  NTIC’s joint ventures traditionally have operated with little or no debt and have been self-financed with minimal initial capital investment and minimal additional capital investment from their respective owners.  Therefore, NTIC believes it is not likely that there exists any exposure to debt by NTIC’s joint ventures that could materially impact their respective operations and/or liquidity.

Uses of Cash and Cash Flows.  Net cash used in operating activities during the six months ended February 28, 2013 was $3,445,681, which resulted principally from NTIC’s equity in income from joint ventures and increases in receivables, inventories and prepaid expenses and a decrease in accounts payables, accrued liabilities and income taxes payable, partially offset by NTIC’s net income, depreciation and amortization.  Net cash used in operating activities during the six months ended February 29, 2012 was $2,790,007 which resulted principally from NTIC’s equity in income from joint ventures and increases in receivables, inventories and prepaid expenses and a decrease in accounts payables, accrued liabilities and income taxes payable, partially offset by NTIC’s net income, depreciation and amortization.

NTIC’s cash flows from operations are impacted by significant changes in certain components of NTIC’s working capital, including inventory turnover and changes in receivables.  NTIC considers internal and external factors when assessing the use of its available working capital, specifically when determining inventory levels and credit terms of customers.  Key internal factors include existing inventory levels, stock reorder points, customer forecasts and customer requested payment terms, and key external factors include the availability of primary raw materials and sub-contractor production lead times.  NTIC’s typical contractual terms for trade receivables excluding joint ventures are traditionally 30 days and for trade receivables from its joint ventures are 90 days.  Before extending unsecured credit to customers, excluding NTIC’s joint ventures, NTIC reviews customers’ credit histories and will establish an allowance for uncollectible accounts based upon factors surrounding the credit risk of specific customers and other information.  Accounts receivable over 30 days are considered past due for most customers.  NTIC does not accrue interest on past due accounts receivable.  If accounts receivables in excess of the provided allowance are determined uncollectible, they are charged to selling expense in the period that determination is made.  Accounts receivable are deemed uncollectible based on NTIC exhausting reasonable efforts to collect. NTIC’s typical contractual terms for receivables for services provided to its joint ventures are 90 days.  NTIC records receivables for services provided to its joint ventures on an accrual basis, unless circumstances exist that make the collection of the balance uncertain in which case the fee income will be recorded on a cash basis until there is consistency in payments.  This determination is handled on a case by case basis.

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NTIC experienced an increase in receivables and inventory as of February 28, 2013 compared to August 31, 2012 due to the increase in net sales and a desire to stock more products to shorten lead times and anticipate customer demand.  Trade receivables excluding joint ventures as of February 28, 2013 increased $235,789 compared to August 31, 2012, primarily related to the increase in NTIC’s net sales.

Outstanding trade receivables excluding joint ventures balances as of February 28, 2013 increased 5 days to an average of 55 days from balances outstanding from these customers as of August 31, 2012.

Outstanding trade receivables from joint ventures as of February 28, 2013 increased $247,466 compared to August 31, 2012 primarily due to the timing of payments.  There was a decrease of outstanding balances from trade receivables from joint ventures as of February 28, 2013 of 13 days from an average of 130 days from balances outstanding from these customers compared to August 31, 2012.  The significant average days outstanding of trade receivables from joint ventures as of February 28, 2013 were primarily due to the receivable balance at NTIC’s joint venture in India, Korea and China.

Outstanding receivables for services provided to joint ventures as of February 28, 2013 increased $1,120,987 compared to August 31, 2012, primarily resulting from the consolidation of $1,376,962 from NTI Asean which resulted in an increase of 18 days of fees receivable outstanding as of February 28, 2013 to an average of 124 days compared to August 31, 2012.

Net cash provided by investing activities for the six months ended February 28, 2013 was $4,349,062, which was comprised of dividends received from joint ventures partially offset by additions to property and equipment and additions to patents and effect of the NTI Asean consolidation on cash of $911,709.  Net cash provided by investing activities for the six months ended February 29, 2012 was $2,870,470 which was comprised of dividends received from joint ventures partially offset by additions to property and equipment and additions to patents.

Net cash provided by financing activities for the six months ended February 28, 2013 was $779,147, which resulted from proceeds from NTIC’s employee stock purchase plan and, to a lesser extent, option exercises and, partially offset by principal payments on the bank loan for NTIC’s corporate headquarters buildings.  Net cash used in financing activities for the six months ended February 29, 2012 was $605, which resulted from proceeds from option exercises and NTIC’s employee stock purchase plan, partially offset by principal payments on the bank loan for NTIC’s corporate headquarters buildings.

Capital Expenditures and Commitments.  NTIC had no material lease or other material capital commitments as of February 28, 2013, except a lease agreement for 16,994 square feet of office, manufacturing, laboratory and warehouse space in Beachwood, Ohio, requiring monthly payments of $17,500, which are adjusted annually according to the annual consumer price index, through November 2014.

NTIC spent $102,000 on capital expenditures during the six months ended February 28, 2013 and expects to spend an aggregate of approximately $1,000,000 on capital expenditures during fiscal 2013.  Such anticipated capital expenditures for fiscal 2013 relate primarily to the expansion of its laboratory facilities in Circle Pines, Minnesota and the purchase of new equipment.

27

Off-Balance Sheet Arrangements

NTIC does not have any relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or special purpose entities, which would have been established for the purpose of facilitating off-balance sheet financial arrangements.  As such, NTIC is not materially exposed to any financing, liquidity, market or credit risk that could arise if NTIC had engaged in such arrangements.

Inflation and Seasonality

Inflation in the U.S. and abroad historically has had little effect on NTIC.  NTIC’s business has not historically been seasonal.

Market Risk

NTIC is exposed to some market risk stemming from changes in foreign currency exchange rates, commodity prices and interest rates.

Because the functional currency of NTIC’s foreign operations and investments in its foreign joint ventures is the applicable local currency, NTIC is exposed to foreign currency exchange rate risk arising from transactions in the normal course of business.  NTIC’s principal exchange rate exposure is with the Euro, the Japanese yen, Indian Rupee, Chinese yuan, Korean won and the English pound against the U.S. dollar.  NTIC’s fees for services provided to joint ventures and dividend distributions from these foreign entities are paid in foreign currencies and thus fluctuations in foreign currency exchange rates could result in declines in NTIC’s reported net income.  Since NTIC’s investments in its joint ventures are accounted for using the equity method, any changes in foreign currency exchange rates would be reflected as a foreign currency translation adjustment and would not change NTIC’s equity in income of joint ventures reflected in its consolidated statements of income.  NTIC does not hedge against its foreign currency exchange rate risk.

Some raw materials used in NTIC’s products are exposed to commodity price changes.  The primary commodity price exposures are with a variety of plastic resins.

At the option of NTIC, outstanding advances under NTIC’s $3,000,000 revolving line of credit with PNC Bank bear interest at either (a) an annual rate based on LIBOR plus 2.15% for the applicable LIBOR interest period selected by NTIC or (b) at the rate publicly announced by PNC Bank from time to time as its prime rate, and thus may subject NTIC to some market risk on interest rates.  As of February 28, 2013, NTIC had no borrowings under the line of credit.

Critical Accounting Policies and Estimates

There have been no material changes to NTIC’s critical accounting policies and estimates from the information provided in “Part II. Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies”, included in NTIC’s annual report on Form 10-K for the fiscal year ended August 31, 2012, except for the following:

28

Principles of Consolidation

NTIC evaluates its voting and variable interests in entities on a qualitative and quantitative basis.  NTIC consolidates entities in which it concludes it has the power to direct the activities that most significantly impact an entity’s economic success and has the obligation to absorb losses or the right to receive benefits that could be significant to the entity.  All such relationships are evaluated on an ongoing basis.  The consolidated financial statements include the accounts of Northern Technologies International Corporation, its wholly owned subsidiaries, NTI Facilities, Inc., Northern Technologies Holding Company, LLC and NTIC’s majority owned subsidiary in Brazil, Zerust Prevenção de Corrosão S.A., and NTIC’s majority owned holding company, NTI Asean LLC.  NTIC’s consolidated financial statements do not include the accounts of any of its joint ventures.  NTIC’s consolidated financial statements do not include Polymer Energy LLC, in which NTIC holds a 62.5% ownership interest.  Polymer Energy LLC had immaterial activity in fiscal 2013 and fiscal 2012.

Forward-Looking Statements

This quarterly report on Form 10-Q contains not only historical information, but also forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and are subject to the safe harbor created by those sections. In addition, NTIC or others on NTIC’s behalf may make forward-looking statements from time to time in oral presentations, including telephone conferences and/or web casts open to the public, in press releases or reports, on NTIC’s Internet web site or otherwise. All statements other than statements of historical facts included in this report or expressed by NTIC orally from time to time that address activities, events or developments that NTIC expects, believes or anticipates will or may occur in the future are forward-looking statements including, in particular, the statements about NTIC’s plans, objectives, strategies, the outcome of contingencies such as legal proceedings, and prospects regarding, among other things, NTIC’s financial condition, results of operations and business. NTIC has identified some of these forward-looking statements in this report with words like “believe,” “may,” “could,” “would,” “might,” “forecast,” “possible,” “potential,” “project,” “will,” “should,” “expect,” “intend,” “plan,” “predict,” “anticipate,” “estimate,” “approximate” “outlook” or “continue” or the negative of these words or other words and terms of similar meaning.  The use of future dates is also an indication of a forward-looking statement.  Forward-looking statements may be contained in the notes to NTIC’s consolidated financial statements and elsewhere in this report, including under the heading “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Forward-looking statements are based on current expectations about future events affecting NTIC and are subject to uncertainties and factors that affect all businesses operating in a global market as well as matters specific to NTIC.  These uncertainties and factors are difficult to predict and many of them are beyond NTIC’s control.  The following are some of the uncertainties and factors known to us that could cause NTIC’s actual results to differ materially from what NTIC has anticipated in its forward-looking statements:

·   The effect of current worldwide economic conditions, the European sovereign debt crisis and turmoil and disruption in the global credit and financial markets on NTIC’s business;

·   The health of the U.S. automotive industry on NTIC’s business;

·   NTIC’s dependence on the success of its joint ventures and fees and dividend distributions that NTIC receives from them;

·   NTIC’s relationships with its joint ventures and its ability to maintain those relationships, especially in light of anticipated succession planning issues;

·   The variability in NTIC’s equity income of joint ventures, which in turn, subjects NTIC’s earnings to quarterly fluctuations;

29

·   Risks associated with NTIC’s international operations and exposure to fluctuations in foreign currency exchange rates and import duties and taxes;

·   Fluctuations in the cost and availability of raw materials, including resins and other commodities;

·   The success of and risks associated with NTIC’s emerging new businesses and products and services, including in particular NTIC’s ability and the ability of NTIC’s joint ventures to sell ZERUST® products and services into oil and gas industry and Natur-Tec® products and the often lengthy and extensive sales process involved in selling such products and services;

·   NTIC’s ability to introduce new products and services that respond to changing market conditions and customer demand;

·   Market acceptance of NTIC’s existing and new products, especially in light of existing and new competitive products;

·   Maturation of certain existing markets for NTIC’s ZERUST® products and services and NTIC’s ability to grow market share and succeed in penetrating other existing and new markets;

·   Increased competition, especially with respect to NTIC’s ZERUST® products and services, and the effect of such competition on NTIC’s and its joint ventures’ pricing, net sales and margins;

·   NTIC’s reliance upon and its relationships with its distributors, independent sales representatives and joint ventures;

·   NTIC’s reliance upon suppliers, including in particular its single supply source for its base bioplastics resins;

·   The costs and effects of complying with laws and regulations and changes in tax, fiscal, government and other regulatory policies, including rules relating to environmental, health and safety matters;

·   The transition of the manufacturing of certain select ZERUST® rust and corrosion inhibiting products in house at NTIC’s corporate headquarters location in Circle Pines, Minnesota;

·   Unforeseen product quality or other problems in the development, production and usage of new and existing products;

·   Loss of or changes in executive management or key employees;

·   Ability of management to manage around unplanned events;

·   NTIC’s reliance on its intellectual property rights and the absence of infringement of the intellectual property rights of others;

·   Fluctuations in NTIC’s effective tax rate; and

·   NTIC’s reliance upon its management information systems.

For more information regarding these and other uncertainties and factors that could cause NTIC’s actual results to differ materially from what NTIC has anticipated in its forward-looking statements or otherwise could materially adversely affect its business, financial condition or operating results, see NTIC’s annual report on Form 10-K for the fiscal year ended August 31, 2012 under the heading “Part I. Item 1A. Risk Factors.”

30

All forward-looking statements included in this report are expressly qualified in their entirety by the foregoing cautionary statements.  NTIC wishes to caution readers not to place undue reliance on any forward-looking statement that speaks only as of the date made and to recognize that forward-looking statements are predictions of future results, which may not occur as anticipated.  Actual results could differ materially from those anticipated in the forward-looking statements and from historical results, due to the uncertainties and factors described above, as well as others that NTIC may consider immaterial or does not anticipate at this time.  Although NTIC believes that the expectations reflected in its forward-looking statements are reasonable, NTIC does not know whether its expectations will prove correct.  NTIC’s expectations reflected in its forward-looking statements can be affected by inaccurate assumptions NTIC might make or by known or unknown uncertainties and factors, including those described above.  The risks and uncertainties described above are not exclusive and further information concerning NTIC and its business, including factors that potentially could materially affect its financial results or condition, may emerge from time to time.  NTIC assumes no obligation to update, amend or clarify forward-looking statements to reflect actual results or changes in factors or assumptions affecting such forward-looking statements.  NTIC advises you, however, to consult any further disclosures NTIC makes on related subjects in its annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K NTIC files with or furnishes to the Securities and Exchange Commission.

ITEM 3.   QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

This Item 3 is inapplicable to NTIC as a smaller reporting company and has been omitted pursuant to Item 305(e) of SEC Regulation S-K.

ITEM 4.   CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

NTIC maintains disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended) that are designed to provide reasonable assurance that information required to be disclosed by NTIC in the reports it files or submits under the Securities Exchange Act of 1934, as amended, is recorded, processed, summarized and reported, within the time periods specified in the Securities and Exchange Commission’s rules and forms and that such information is accumulated and communicated to NTIC’s management, including NTIC’s principal executive officer and principal financial officer, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.  NTIC’s management evaluated, with the participation of its Chief Executive Officer and its Chief Financial Officer, the effectiveness of the design and operation of NTIC’s disclosure controls and procedures as of the end of the period covered in this report.  Based on that evaluation, NTIC’s Chief Executive Officer and Chief Financial Officer concluded that NTIC’s disclosure controls and procedures were effective as of the end of such period to provide reasonable assurance that information required to be disclosed in the reports that NTIC files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to NTIC’s management, including NTIC’s Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There was no change in NTIC’s internal control over financial reporting that occurred during the quarter ended February 28, 2013 that has materially affected, or is reasonably likely to materially affect NTIC’s internal control over financial reporting, other than the consolidation of NTI Asean.

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PART IIOTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Not applicable.

ITEM 1A. RISK FACTORS

This Item 1A is inapplicable to NTIC as a smaller reporting company.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Recent Sales of Unregistered Equity Securities

During the three months ended February 28, 2013, NTIC did not issue any shares of its common stock or other equity securities of NTIC that were not registered under the Securities Act of 1933, as amended.

Issuer Purchases of Equity Securities

During the three months ended February 28, 2013, NTIC did not purchase any shares of its common stock or other equity securities of NTIC.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

Not applicable.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

Not applicable.

ITEM 6. EXHIBITS

The following exhibits are being filed or furnished with this quarterly report on Form 10-Q:

Exhibit No.	Description
10.1	Waiver and Second Amendment to Loan Documents dated December 11, 2012 between Northern Technologies International Corporation and PNC Bank, National Association (incorporated by reference to Exhibit 10.1 to NTIC’s quarterly report on Form 10-Q for the fiscal quarter ended November 30, 2012 (File No. 001-11038))
31.1	Certification of Chief Executive Officer Pursuant to Exchange Act Rules 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (filed herewith)
31.2	Certification of Chief Financial Officer Pursuant to Exchange Act Rules 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (filed herewith)

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Exhibit No.	Description
32.1	Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)
32.2	Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)
101	The following materials from Northern Technologies International Corporation’s Quarterly Report on Form 10-Q for the fiscal quarter ended February 28, 2013, formatted in XBRL (Extensible Business Reporting Language): (i) the unaudited Consolidated Balance Sheets, (ii) the unaudited Consolidated Statements of Operations, (iii) the unaudited Consolidated Statements of Comprehensive Income, (iv) the unaudited Consolidated Statements of Cash Flows, and (v) Notes to Condensed Financial Statements (furnished herewith)*

_____________________

* Pursuant to Rule 406T of Regulation S-T, the XBRL related information in Exhibit 101 to this quarterly report on Form 10-Q shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section, and shall not be deemed part of a registration statement, prospectus or other document filed under Section 11 or 12 of the Securities Act of 1933, as amended, or otherwise subject to the liability of those sections, except as shall be expressly set forth by specific reference in such filings.

33

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION

Date:  April 12, 2013                                                                             Matthew C. Wolsfeld, CPA

Chief Financial Officer

(Principal Financial and Accounting Officer and

Duly Authorized to Sign on Behalf of the Registrant)

34

NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION

QUARTERLY REPORT ON FORM 10-Q

EXHIBIT INDEX

Exhibit No.	Description	Method of Filing
10.1	Waiver and Second Amendment to Loan Documents dated December 11, 2012 between Northern Technologies International Corporation and PNC Bank, National Association	Incorporated by reference to Exhibit 10.1 to NTIC’s quarterly report on Form 10-Q for the fiscal quarter ended November 30, 2012 (File No. 001-0857886)
31.1	Certification of Chief Executive Officer Pursuant to Exchange Act Rules 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002	Filed herewith
31.2	Certification of Chief Financial Officer Pursuant to Exchange Act Rules 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002	Filed herewith
32.1	Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002	Furnished herewith
32.2	Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002	Furnished herewith
101	The following materials from Northern Technologies International Corporation’s Quarterly Report on Form 10-Q for the fiscal quarter ended February 28, 2013, formatted in XBRL (Extensible Business Reporting Language): (i) the unaudited Consolidated Balance Sheets, (ii) the unaudited Consolidated Statements of Operations, (iii) the unaudited Consolidated Statements of Comprehensive Income, (iv) the unaudited Consolidated Statements of Cash Flows, and (v) Notes to Condensed Financial Statements*	Furnished herewith

* Pursuant to Rule 406T of Regulation S-T, the XBRL related information in Exhibit 101 to this quarterly report on Form 10-Q shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liability of that section, and shall not be deemed part of a registration statement, prospectus or other document filed under Section 11 or 12 of the Securities Act of 1933, as amended, or otherwise subject to the liability of those sections, except as shall be expressly set forth by specific reference in such filings.

35

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO SECTION 302(a) OF THE SARBANES-OXLEY ACT OF 2002

I, G. Patrick Lynch, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Northern Technologies International Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)               Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)               Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external reporting purposes in accordance with generally accepted accounting principles;

(c)               Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)               Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and:

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal controls over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent function):

(a)                All significant deficiencies and material weaknesses in the design or operation of internal controls over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)                Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal controls over financial reporting.

Date:  April 12, 2013                                                                             

G. Patrick Lynch

President and Chief Executive Officer

(principal executive officer)

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO SECTION 302(a) OF THE SARBANES-OXLEY ACT OF 2002

I, Matthew C. Wolsfeld, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Northern Technologies International Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have::

(a)               Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)               Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external reporting purposes in accordance with generally accepted accounting principles;

(c)               Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)               Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and:

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal controls over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent function):

(a)                All significant deficiencies and material weaknesses in the design or operation of internal controls over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)                Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal controls over financial reporting.

Date:  April 12, 2013                                                                         Matthew C. Wolsfeld, CPA

Chief Financial Officer and Corporate Secretary

(principal financial officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Northern Technologies International Corporation (the “Company”) on Form 10-Q for the period ended February 28, 2013 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, G. Patrick Lynch, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge and belief:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

_________________________

G. Patrick. Lynch

President and Chief Executive Officer

(principal executive officer)

Circle Pines, Minnesota

April 12, 2013

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Northern Technologies International Corporation (the “Company”) on Form 10-Q for the period ended February 28, 2013 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Matthew C. Wolsfeld, Chief Financial Officer and Corporate Secretary of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge and belief:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

_______________________

Matthew C. Wolsfeld, CPA

Chief Financial Officer and Corporate Secretary

(principal financial officer and principal accounting officer)

Circle Pines, Minnesota

April 12, 2013

XML

Note 7 - Corporate Debt (Detail) (USD $)		6 Months Ended		6 Months Ended
	Feb. 28, 2013	Feb. 28, 2013 Monthly Payments [Member] Term Loan [Member]	Feb. 28, 2013 Term Loan [Member]	Feb. 28, 2013 Term Loan and Line of Credit Agreements "Loan Agreements" [Member]	Feb. 28, 2013 Revolving Credit Facility [Member]	Feb. 29, 2012 Revolving Credit Facility [Member]
Long-term Debt, Gross (in Dollars)	$ 971,474
Debt Instrument, Basis Spread on Variable Rate			2.15%		2.15%
Debt Instrument, Periodic Payment, Principal (in Dollars)		6,343
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)					$ 3,000,000
Line of Credit Facility, Interest Rate at Period End					2.93%	3.24%
Debt, Weighted Average Interest Rate					3.04%	3.13%
Debt Instrument, Covenants, Fixed Charge Coverage Ratio				1.10:1.00

XML

Note 11 - Geographic And Segment Information (Detail) - Net Sales By Segment: (USD $)	3 Months Ended		6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
Net Sales	$ 5,246,350	$ 4,974,328	$ 10,538,097	$ 9,806,442
ZERUST [Member]
Net Sales	4,710,412	4,570,779	9,505,695	9,023,425
Natur-Tec [Member]
Net Sales	$ 535,938	$ 403,549	$ 1,032,402	$ 783,017

XML

Note 11 - Geographic And Segment Information (Detail) - Net Sales By Geographic Location as a Percentage of Total Consolidated Net Sales:	3 Months Ended		6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
Net Sales, Percentage	100.00%	100.00%	100.00%	100.00%
Inside the U.S.A to Unaffiliated Customers [Member]
Net Sales, Percentage	65.60%	58.90%	68.40%	63.30%
Joint Ventures In Which The Company Is A Shareholder Directly And Indirectly - Outside the U.S.A [Member]
Net Sales, Percentage	18.20%	11.90%	16.80%	13.70%
Unaffiliated Customers - Outside the U.S.A [Member]
Net Sales, Percentage	16.20%	29.20%	14.80%	23.00%

XML

Note 4 - Property and Equipment, Net (Detail) - Components of Property and Equipment, Net: (USD $)	Feb. 28, 2013	Aug. 31, 2012
Land	$ 310,365	$ 310,365
Buildings and improvements	3,556,041	3,406,674
Machinery and equipment	2,861,709	2,908,021
	6,728,115	6,625,060
Less accumulated depreciation	(2,545,380)	(2,336,442)
	$ 4,182,735	$ 4,288,618

XML

Note 8 - Stockholders' Equity (Tables)

6 Months Ended

Feb. 28, 2013

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

Options Exercised	Exercise Price
25,140	$9.95
1,734	7.65

Options Exercised	Exercise Price
1,966	$           7.65

XML

Note 11 - Geographic And Segment Information (Detail) - Total assets by geographic distribution: (USD $)	Feb. 28, 2013	Aug. 31, 2012
Total assets	$ 45,439,407	$ 41,877,627
Brazil [Member]
Total assets	1,456,793	1,744,693
North America [Member]
Total assets	$ 43,982,614	$ 40,132,934

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Note 9 - Net Income Per Common Share (Detail) (Stock Options [Member])	3 Months Ended		6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	48,000	26,000	48,000	26,000

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Note 6 - Investments in Joint Ventures (Detail) - Condensed Balance Sheet of EXCOR and NTI ASEAN, and All Other Joint Ventures: (USD $)	Feb. 28, 2013	Aug. 31, 2012
Current assets	$ 61,997,739	$ 61,973,725
Total assets	68,522,275	68,585,974
Current liabilities	19,532,691	18,686,181
Noncurrent liabilities	4,210,364	4,700,458
Joint ventures’ equity	44,779,219	45,199,335
Northern Technologies International Corporation’s share of joint ventures’ equity	22,189,562	21,461,492
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	20,075,092	19,403,150
EXCOR [Member]
Current assets	22,196,110	24,357,139
Total assets	24,625,927	26,620,589
Current liabilities	3,848,126	4,749,574
Joint ventures’ equity	20,777,801	21,871,015
Northern Technologies International Corporation’s share of joint ventures’ equity	10,388,902	10,935,509
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	10,357,997	10,904,604
China [Member]
Current assets	12,442,364
Total assets	12,474,170
Current liabilities	5,094,516
Noncurrent liabilities	856,978
Joint ventures’ equity	6,522,675
Northern Technologies International Corporation’s share of joint ventures’ equity	3,261,338
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	3,215,436
All Other [Member]
Current assets	27,359,265	22,257,619
Total assets	31,422,178	26,442,929
Current liabilities	10,590,049	8,172,750
Noncurrent liabilities	3,353,386	3,644,493
Joint ventures’ equity	17,478,742	14,625,686
Northern Technologies International Corporation’s share of joint ventures’ equity	8,539,322	6,840,579
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	6,501,659	5,184,101
NTI ASEAN [Member]
Current assets		15,358,967
Total assets		15,522,456
Current liabilities		5,763,857
Noncurrent liabilities		1,055,965
Joint ventures’ equity		8,702,634
Northern Technologies International Corporation’s share of joint ventures’ equity		3,685,404
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings		$ 3,314,445

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Note 12 - Research and Development (Detail) (USD $)	3 Months Ended		6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013 Research and Development Contracts [Member]	Aug. 31, 2012 Research and Development Contracts [Member]
Research and Development Expense	$ 912,393	$ 974,777	$ 1,850,599	$ 1,789,082
Research and Development Arrangement, Contract to Perform for Others, Costs Incurred, Gross			137,364	228,576
Contract Receivable					85,418
Deferred Revenue						$ 96,861

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Note 11 - Geographic And Segment Information (Detail) - Fees For Services Provided to Joint Ventures By Geographic Location as a Percentage of Total Fees for Services Provided to Joint Ventures: (USD $)	3 Months Ended				6 Months Ended
	Feb. 28, 2013		Feb. 29, 2012		Feb. 28, 2013		Feb. 29, 2012
Total Fees for Services Provided to Joint Ventures (in Dollars)	$ 1,770,881		$ 1,298,126		$ 3,617,158		$ 2,743,378
Percentage of Total Fees for Services Provided to Joint Ventures	100.00%		100.00%		100.00%		100.00%
China [Member]
Total Fees for Services Provided to Joint Ventures (in Dollars)	450,586	[1]		[1]	943,897	[1]		[1]
Percentage of Total Fees for Services Provided to Joint Ventures	25.40%	[1]	0.00%	[1]	26.10%	[1]	0.00%	[1]
Germany [Member]
Total Fees for Services Provided to Joint Ventures (in Dollars)	249,513		251,387		492,213		500,833
Percentage of Total Fees for Services Provided to Joint Ventures	14.10%		19.40%		13.60%		18.30%
Japan [Member]
Total Fees for Services Provided to Joint Ventures (in Dollars)	169,205		214,984		371,186		503,522
Percentage of Total Fees for Services Provided to Joint Ventures	9.60%		16.60%		10.30%		18.40%
Poland [Member]
Total Fees for Services Provided to Joint Ventures (in Dollars)	154,839		130,470		301,989
Percentage of Total Fees for Services Provided to Joint Ventures	8.70%		10.10%		8.40%		0.00%
Thailand [Member]
Total Fees for Services Provided to Joint Ventures (in Dollars)	148,303	[1]		[1]	276,398	[1]	268,643	[1]
Percentage of Total Fees for Services Provided to Joint Ventures	8.40%	[1]	0.00%	[1]	7.60%	[1]	9.80%	[1]
France [Member]
Total Fees for Services Provided to Joint Ventures (in Dollars)	147,896		127,004		266,311		228,298
Percentage of Total Fees for Services Provided to Joint Ventures	8.30%		9.80%		7.40%		8.30%
Korea [Member]
Total Fees for Services Provided to Joint Ventures (in Dollars)	123,388	[2]	532	[2]	262,131	[2]	76,997	[2]
Percentage of Total Fees for Services Provided to Joint Ventures	7.00%	[2]	0.00%	[2]	7.20%	[2]	2.80%	[2]
Sweden [Member]
Total Fees for Services Provided to Joint Ventures (in Dollars)	77,627		148,277		164,619		304,934
Percentage of Total Fees for Services Provided to Joint Ventures	4.40%		11.40%		4.60%		11.10%
Finland [Member]
Total Fees for Services Provided to Joint Ventures (in Dollars)	72,329		118,911		160,180		251,407
Percentage of Total Fees for Services Provided to Joint Ventures	4.10%		9.20%		4.40%		9.20%
United Kingdom [Member]
Total Fees for Services Provided to Joint Ventures (in Dollars)	35,754		80,639		102,812		160,138
Percentage of Total Fees for Services Provided to Joint Ventures	2.00%		6.20%		2.80%		5.80%
India [Member]
Total Fees for Services Provided to Joint Ventures (in Dollars)			163,689				299,844
Percentage of Total Fees for Services Provided to Joint Ventures	0.00%		12.60%		0.00%		10.90%
Other Countries [Member]
Total Fees for Services Provided to Joint Ventures (in Dollars)	$ 141,441		$ 62,233		$ 275,422		$ 148,762
Percentage of Total Fees for Services Provided to Joint Ventures	8.00%		4.80%		7.60%		5.40%

[1] Joint venture owned by NTI Asean.

[2] Joint venture owned by NTI Asean as of February 28, 2013, but not as of February 29, 2012. NTI Asean results are not included on the consolidated financial statements for the three months ended February 29, 2012. (See Note 2)

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Note 3 - Inventories

6 Months Ended

Feb. 28, 2013

Inventory Disclosure [Text Block]

3.           INVENTORIES

Inventories consisted of the following:

	February 28, 2013		August 31, 2012
Production materials	$	952,997	$	1,462,615
Finished goods		4,200,534		2,688,582
	$	5,153,531	$	4,151,197

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Note 9 - Net Income Per Common Share (Detail) - Reconciliation of the Earnings Per Share Computations: (USD $)	3 Months Ended		6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
Net income attributable to NTIC (in Dollars)	$ 434,410	$ 606,193	$ 824,032	$ 1,564,950
Basic – weighted shares outstanding	4,418,821	4,398,356	4,409,954	4,366,932
Weighted shares assumed upon exercise of stock options	66,255	68,079	50,243	73,069
Diluted – weighted shares outstanding	4,485,076	4,466,435	4,460,197	4,440,001
Basic earnings per share: (in Dollars per share)	$ 0.10	$ 0.14	$ 0.19	$ 0.36
Diluted earnings per share: (in Dollars per share)	$ 0.10	$ 0.14	$ 0.18	$ 0.35

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Note 2 - NTI ASEAN (Detail)			1 Months Ended
	Sep. 30, 2012 NTI ASEAN [Member]	Aug. 31, 2012 NTI ASEAN [Member]	Sep. 30, 2012 Capitalization Rate To Determine Fair Value of NTI Asean [Member]
Equity Method Investment, Ownership Percentage		50.00%
Business Acquisition, Percentage of Voting Interests Acquired	10.00%
Business Acquisition, Ownership Percentage Subsequent to Acquisition	60.00%
Fair Value Inputs, Discount Rate			25.00%

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Note 11 - Geographic And Segment Information (Tables)

6 Months Ended

Feb. 28, 2013

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

	Three Months Ended						Six Months Ended
	February 28, 2013			February 29, 2012			February 28, 2013			February 29, 2012
Inside the U.S.A. to unaffiliated customers		65.6	%		58.9	%		68.4	%		63.3	%
Outside the U.S.A to:
Joint ventures in which the Company is a shareholder directly and indirectly		18.2	%		11.9	%		16.8	%		13.7	%
Unaffiliated customers		16.2	%		29.2	%		14.8	%		23.0	%
		100.0	%		100.0	%		100.0	%		100.0	%

Reconciliation of Revenue from Segments to Consolidated [Table Text Block]

	Three Months Ended				Six Months Ended
	February 28, 2013		February 29, 2012		February 28, 2013		February 29, 2012
ZERUST® sales	$	4,710,412	$	4,570,779	$	9,505,695	$	9,023,425
Natur-Tec™ sales		535,938		403,549		1,032,402		783,017
	$	5,246,350	$	4,974,328	$	10,538,097	$	9,806,442

Reconciliation of Cost of Good Sold from Segments to Consolidated [Table Text Block]

	Three Months Ended										Six Months Ended
	February 28, 2013		% of Product Sales*			February 29, 2012		% of Product Sales*			February 28, 2013		% of Product Sales*			February 29, 2012		% of Product Sales*
Direct cost of goods sold
ZERUST®	$	2,623,070		55.7	%	$	2,569,588		56.2	%	$	5,267,365		55.4	%	$	5,027,387		55.7	%
Natur-Tec®		453,147		84.6	%		361,704		89.6	%		892,820		86.5	%		658,265		84.1	%
Indirect cost of goods sold		557,696		—			548,790		—			1,164,700		—			1,003,906		—
Total net cost of goods sold	$	3,633,913				$	3,480,082				$	7,324,885				$	6,689,558

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

	At February 28, 2013
	Brazil		North America		Total
Total assets	$	1,456,793	$	43,982,614	$	45,439,407

	At August 31, 2012
	Brazil		North America		Total
Total assets	$	1,744,693	$	40,132,934	$	41,877,627

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Six Months Ended February 28, 2013
	Brazil			North America		Total
Net sales	$	1,131,469		$	9,406,628	$	10,538,097
Operating income	$	(106,759	)	$	1,950,278	$	1,843,519

	Six Months Ended February 29, 2012
	Brazil			North America		Total
Net sales	$	1,216,532		$	8,589,910	$	9,806,442
Operating income	$	(173,651	)	$	1,897,972	$	1,724,321

Fees For Services Provided to Joint Ventures [Member]

Reconciliation of Revenue from Segments to Consolidated [Table Text Block]

	Three Months Ended
	February 28, 2013		% of Total Fees for Services Provided to Joint Ventures			February 29, 2012		% of Total Fees for Services Provided to Joint Ventures
China*	$	450,586		25.4	%	$	—		0.0	%
Germany		249,513		14.1	%		251,387		19.4	%
Japan		169,205		9.6	%		214,984		16.6	%
Poland		154,839		8.7	%		130,470		10.1	%
Thailand*		148,303		8.4	%		—		0.0	%
France		147,896		8.3	%		127,004		9.8	%
Korea**		123,388		7.0	%		532		0.0	%
Sweden		77,627		4.4	%		148,277		11.4	%
Finland		72,329		4.1	%		118,911		9.2	%
United Kingdom		35,754		2.0	%		80,639		6.2	%
India		—		0.0	%		163,689		12.6	%
Other		141,441		8.0	%		62,233		4.8	%
	$	1,770,881		100.0	%	$	1,298,126		100.0	%

	Six Months Ended
	February 28, 2013		% of Total Fees for Services Provided to Joint Ventures			February 29, 2012		% of Total Fees for Services Provided to Joint Ventures
China*	$	943,897		26.1	%	$	—		0.0	%
Germany		492,213		13.6	%		500,833		18.3	%
Japan		371,186		10.3	%		503,522		18.4	%
Thailand*		301,989		8.4	%		—		0.0	%
France		276,398		7.6	%		268,643		9.8	%
Poland		266,311		7.4	%		228,298		8.3	%
Korea**		262,131		7.2	%		76,997		2.8	%
Sweden		164,619		4.6	%		304,934		11.1	%
Finland		160,180		4.4	%		251,407		9.2	%
United Kingdom		102,812		2.8	%		160,138		5.8	%
India		—		0.0	%		299,844		10.9	%
Other		275,422		7.6	%		148,762		5.4	%
	$	3,617,158		100.0	%	$	2,743,378		100.0	%

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Note 10 - Stock-Based Compensation (Detail) (USD $)	6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term		5 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	118,294	26,000
Allocated Share-based Compensation Expense, Net of Tax, Per Share (in Dollars per share)	$ 0.03	$ 0.03
Allocated Share-based Compensation Expense, Estimate, Remainder of Fiscal Year	$ 173,220
Allocated Share-based Compensation Expense, Estimate, Next Fiscal Year	185,815
Allocated Share-based Compensation Expense, Estimate, Fiscal Year Two	99,964
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$ 5.53	$ 7.14
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	4 years 211 days	2 years 25 days
Net of Estimated Forfeitures [Member]
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options	478,992
Stock Options [Member]
Allocated Share-based Compensation Expense	$ 137,550	$ 145,046
2007 Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
2007 Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)	800,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	5 years
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)	100,000
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date	90.00%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	5 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	10 years

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Note 2 - NTI ASEAN (Detail) - Allocation of the total transaction amount: (USD $)	Sep. 30, 2012
Net assets acquired (liabilities assumed):
Cash and cash equivalents	$ 1,613,000
Accounts receivables	1,342,000
Investments in joint ventures	4,967,000
Value of assets	7,922,000
Purchase price:
Fair value of non-controlling interest	3,961,000
Value of previously held interest	3,961,000
Total consideration	$ 7,922,000

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Note 2 - NTI ASEAN (Detail) - Pro Forma Effects of Consolidation of NTI Asean on the Company's Consolidated Financial Statements as of the Beginning of the Period For the Three Months Ended November 30, 2011: (USD $)	3 Months Ended		6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
Net sales	$ 5,246,350	$ 4,974,328	$ 10,538,097	$ 9,806,442
Cost of goods sold	3,633,913	3,480,082	7,324,885	6,689,558
Gross profit	1,612,437	1,494,246	3,213,212	3,116,884
Joint venture operations	2,909,319	2,522,801	5,909,892	5,325,733
Operating expenses	3,551,901	3,325,228	7,279,585	6,718,296
Operating income	969,855	691,819	1,843,519	1,724,321
Income before income tax expense	985,155	703,991	1,877,691	1,745,412
Income tax expense	240,000	100,000	374,000	206,000
Net income	745,155	603,991	1,503,691	1,539,412
Net income attributable to non-controlling interest	310,745	(2,202)	679,659	(25,538)
Net income attributable to NTIC	434,410	606,193	824,032	1,564,950
Net income per common diluted share (in Dollars per share)	$ 0.10	$ 0.14	$ 0.18	$ 0.35
As Reported [Member]
Net sales		4,974,328		9,806,442
Cost of goods sold		3,480,082		6,689,558
Gross profit		1,494,246		3,116,884
Joint venture operations		2,522,801		5,325,733
Operating expenses		3,325,228		6,718,296
Operating income		691,819		1,724,321
Income before income tax expense		703,991		1,745,412
Income tax expense		100,000		206,000
Net income		603,991		1,539,412
Net income attributable to non-controlling interest		(2,202)		(25,538)
Net income attributable to NTIC		606,193		1,564,950
Net income per common diluted share (in Dollars per share)		$ 0.13		$ 0.35
NTI ASEAN [Member]
Joint venture operations		868,382		1,699,280
Operating expenses		20,470		23,135
Operating income		847,912		1,676,145
Income before income tax expense		847,912		1,676,145
Income tax expense		95,500		184,811
Net income		752,412		1,491,334
Net income attributable to non-controlling interest		(300,965)		(596,534)
Net income attributable to NTIC		451,447		894,800
Net income per common diluted share (in Dollars per share)		$ 0.10		$ 0.20
Eliminated in Consolidation [Member]
Joint venture operations		(322,654)		(692,115)
Operating income		(322,654)		(692,115)
Income before income tax expense		(322,654)		(692,115)
Net income		(322,654)		(692,115)
Net income attributable to NTIC		(322,654)		(692,115)
Net income per common diluted share (in Dollars per share)		$ (0.08)		$ (0.16)
Pro Forma [Member]
Net sales		4,974,328		9,806,442
Cost of goods sold		3,480,082		6,689,558
Gross profit		1,494,246		3,116,884
Joint venture operations		3,068,529		6,332,898
Operating expenses		3,345,698		6,741,431
Operating income		1,217,077		2,708,351
Income before income tax expense		1,229,249		2,729,442
Income tax expense		195,500		390,811
Net income		1,033,749		2,338,631
Net income attributable to non-controlling interest		(303,167)		(622,072)
Net income attributable to NTIC		$ 734,804		$ 1,767,635
Net income per common diluted share (in Dollars per share)		$ 0.16		$ 0.40

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Note 2 - NTI ASEAN

6 Months Ended

Feb. 28, 2013

Business Combination Disclosure [Text Block]

2.           NTI ASEAN

NTI Asean LLC (NTI Asean) is an entity that holds investments in eight entities operating in the Association of Southeast Asian Nations (ASEAN) region, including the following countries: China, Indonesia, Korea, Malaysia, Philippines, Singapore, Taiwan and Thailand.

Prior to September 1, 2012, the Company owned 50% of NTI Asean, which it considered to be less than a majority, of the equity and voting rights and accounted for its investment using the equity method.  On September 1, 2012, the Company obtained an additional 10% ownership interest in NTI Asean in exchange for a license agreement, and thereafter holds 60% of the equity and voting rights of NTI Asean.

The Company accounted for the transaction resulting in the additional ownership as a business combination.  Beginning in the first quarter of fiscal 2013, the Company consolidated the results of NTI Asean.  Immediately prior to the transaction, the Company re-measured the fair value of NTI Asean and determined that there was no difference between the fair value and the book value of the entity.  As a result, there was no accounting impact related to the business combination in the consolidated statements of operations.

The Company determined the fair value of NTI Asean using the capitalized income method, including a capitalization rate of 25%.  The allocation of the total transaction amount was as follow:

Net assets acquired (liabilities assumed):
Cash and cash equivalents	$	1,613,000
Accounts receivables		1,342,000
Investments in joint ventures		4,967,000
Value of assets	$	7,922,000
Purchase price:
Fair value of non-controlling interest	$	3,961,000
Value of previously held interest		3,961,000
Total consideration	$	7,922,000

The following is a summary of certain line items of the Company’s consolidated statement of operations for the three months ended February 29, 2012 as reported and on a pro forma basis, assuming the consolidation of NTI Asean on the Company’s consolidated financial statements as of the beginning of such period:

				NTI			Eliminated in
	As Reported			Asean			Consolidation			Pro Forma
Net sales	$	4,974,328		$	—		$	—		$	4,974,328
Cost of goods sold		3,480,082			—			—			3,480,082
Gross profit		1,494,246			—			—			1,494,246
Joint venture operations		2,522,801			868,382			(322,654	)		3,068,529
Operating expenses		3,325,228			20,470			—			3,345,698
Operating income		691,819			847,912			(322,654	)		1,217,077
Income before income tax expense		703,991			847,912			(322,654	)		1,229,249
Income tax expense		100,000			95,500			—			195,500
Net income		603,991			752,412			(322,654	)		1,033,749
Net income attributable to non-controlling interest		(2,202	)		(300,965	)		—			(303,167	)
Net income attributable to NTIC		606,193			451,447			(322,654	)		734,804
Net income per common diluted share	$	0.13		$	0.10		$	(0.08	)	$	0.16

The following is a summary of certain line items of the Company’s consolidated statements of operations for the six months ended February 29, 2012 as reported and on a pro forma basis, assuming the consolidation of NTI Asean on the Company’s consolidated financial statements as of the beginning of such period:

				NTI			Eliminated in
	As Reported			Asean			Consolidation			Pro Forma
Net sales	$	9,806,442		$	—		$	—		$	9,806,442
Cost of goods sold		6,689,558			—			—			6,689,558
Gross profit		3,116,884			—			—			3,116,884
Joint venture operations		5,325,733			1,699,280			(692,115	)		6,332,898
Operating expenses		6,718,296			23,135			—			6,741,431
Operating income		1,724,321			1,676,145			(692,115	)		2,708,351
Income before income tax expense		1,745,412			1,676,145			(692,115	)		2,729,442
Income tax expense		206,000			184,811			—			390,811
Net income		1,539,412			1,491,334			(692,115	)		2,338,631
Net income attributable to non-controlling interest		(25,538	)		(596,534	)		—			(622,072	)
Net income attributable to NTIC		1,564,950			894,800			(692,115	)		1,767,635
Net income per common diluted share	$	0.35		$	0.20		$	(0.16	)	$	0.40

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Note 3 - Inventories (Detail) - Inventories: (USD $)	Feb. 28, 2013	Aug. 31, 2012
Production materials	$ 952,997	$ 1,462,615
Finished goods	4,200,534	2,688,582
	$ 5,153,531	$ 4,151,197

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Note 8 - Stockholders' Equity (Detail) (USD $)	6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	118,294	26,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)	$ 10.25	$ 16.45
Common Stock Bonuses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		42,707
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)		$ 14.42
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Aggregate Fair Value (in Dollars)		$ 615,830

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Note 13 - Commitments and Contingencies (Detail) (USD $)				6 Months Ended
	Feb. 28, 2013	Aug. 31, 2012	Feb. 29, 2012	Feb. 28, 2013 Executive Officer [Member] Fiscal 2012 Bonus Plan [Member]	Feb. 28, 2013 Fiscal 2012 Bonus Plan [Member]
Percentage of Company's Earnings Before Interest, Taxes, and Other Income Available Under the Bonus Plan, Maximum					25.00%
Adjusted EBITOI As Percentage of Target EBITOI, Threshold To Pay Bonus					70.00%
Percentage of Individual Bonus Payout Determined By Actual Versus Targeted EBITOI Results				50.00%
Percentage of Individual's Payout Determined Upon Achievement of Certain Pre-Established Individual Performance Objectives				50.00%
Accrued Bonuses (in Dollars)	$ 275,000		$ 542,720
Operating Leases, Future Minimum Payments, Remainder of Fiscal Year (in Dollars)	119,250
Operating Leases, Future Minimum Payments, Due in Two Years (in Dollars)	59,500
Operating Leases, Future Minimum Payments, Due Thereafter (in Dollars)	$ 0
Entity-Wide Trade Joint Venture Receivables, Three Joint Ventures, Percentage	54.20%	55.30%

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Consolidated Balance Sheets (Unaudited) (USD $)	Feb. 28, 2013	Aug. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 4,261,145	$ 4,137,547
Trade excluding joint ventures, less allowance for doubtful accounts of $20,000 at February 28, 2013 and August 31, 2012	2,752,750	2,516,961
Trade joint ventures	982,009	734,543
Fees for services provided to joint ventures	2,437,920	1,316,933
Income taxes	109,677	58,129
Inventories	5,153,531	4,151,197
Prepaid expenses	640,286	548,331
Deferred income taxes	596,085	596,085
Total current assets	16,933,403	14,059,726
PROPERTY AND EQUIPMENT, NET	4,182,735	4,288,618
OTHER ASSETS:
Investments in joint ventures	22,189,562	21,461,492
Deferred income taxes	1,030,610	1,030,610
Patents and trademarks, net	1,027,097	961,181
Other	76,000	76,000
Total other assets	24,323,269	23,529,283
Total assets	45,439,407	41,877,627
CURRENT LIABILITIES:
Current portion of note payable	77,090	76,120
Accounts payable	1,254,432	1,818,309
Accrued liabilities:
Payroll and related benefits	623,830	1,565,866
Deferred joint venture royalties	288,000	288,000
Other	100,484	251,350
Total current liabilities	2,343,836	3,999,645
NOTE PAYABLE, NET OF CURRENT PORTION (Note 7)	894,384	933,413
COMMITMENTS AND CONTINGENCIES (Note 13)
EQUITY:
Common stock, $0.02 par value per share; authorized 10,000,000 shares; issued and outstanding 4,418,821 and 4,403,656, respectively	88,376	88,073
Additional paid-in capital	11,399,966	11,130,966
Retained earnings	26,084,067	25,260,034
Accumulated other comprehensive income	618,099	277,583
Stockholders’ equity	38,190,508	36,756,656
Non-controlling interest	4,010,679	187,913
Total equity	42,201,187	36,944,569
Total liabilities and equity	$ 45,439,407	$ 41,877,627

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Note 10 - Stock-Based Compensation (Detail) - Black-Scholes Option-Pricing Model Assumptions:	6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Dividend yield	0.00%	0.00%
Expected volatility	48.00%	48.80%
Expected life of option (years)		5 years
Average risk-free interest rate	0.71%	1.31%
Minimum [Member]
Expected life of option (years)	5 years
Maximum [Member]
Expected life of option (years)	10 years

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Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 1,503,691	$ 1,539,412
Adjustments to reconcile net income to net cash used in operating activities:
Expensing of fair value of stock options vested	137,550	145,046
Depreciation expense	211,874	163,171
Amortization expense	35,122	77,493
Loss on disposal of assets	13,845
Equity in income from joint ventures	(2,292,734)	(2,582,355)
Receivables:
Trade, excluding joint ventures	(223,731)	(290,512)
Trade, joint ventures	(247,466)	(316,174)
Fees for services receivables, joint ventures	221,099	164,795
Income taxes	(51,111)	(822)
Inventories	(990,720)	(111,041)
Prepaid expenses and other	(91,869)	(425,711)
Accounts payable	(574,037)	(902,749)
Income tax payable	(2,748)	(51,921)
Accrued liabilities	(1,094,446)	(198,639)
Net cash used in operating activities	(3,445,681)	(2,790,007)
CASH FLOWS FROM INVESTING ACTIVITIES:
Dividends received from joint ventures	2,953,435	3,036,344
Additions to property and equipment	(102,259)	(80,698)
Effect of NTI Asean consolidation on cash (Note 2)	1,612,768
Additions to patents	(114,882)	(85,176)
Net cash provided by investing activities	4,349,062	2,870,470
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of note payable	(38,059)	(38,059)
Dividend received by non-controlling interest	(872,841)
Proceeds from employee stock purchase plan	28,938	22,414
Proceeds from exercise of stock options	102,815	15,040
Net cash provided by financing activities	(779,147)	(605)
EFFECT OF EXCHANGE RATE CHANGES ON CASH:	(636)	(10,422)
NET INCREASE IN CASH AND CASH EQUIVALENTS	123,598	69,436
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	4,137,547	3,266,362
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 4,261,145	$ 3,335,798

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Note 5 - Patents and Trademarks, Net (Detail) - Patents and Trademarks, Net: (USD $)	Feb. 28, 2013	Aug. 31, 2012
Patents and trademarks	$ 2,045,102	$ 1,945,785
Less accumulated amortization	(1,018,005)	(984,604)
	$ 1,027,097	$ 961,181

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Note 4 - Property and Equipment, Net (Tables)

6 Months Ended

Feb. 28, 2013

Property, Plant and Equipment [Table Text Block]

	February 28, 2013			August 31, 2012
Land	$	310,365		$	310,365
Buildings and improvements		3,556,041			3,406,674
Machinery and equipment		2,861,709			2,908,021
		6,728,115			6,625,060
Less accumulated depreciation		(2,545,380	)		(2,336,442	)
	$	4,182,735		$	4,288,618

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Note 6 - Investments in Joint Ventures (Detail) (NTI ASEAN [Member])	Sep. 30, 2012	Aug. 31, 2012
NTI ASEAN [Member]
Equity Method Investment, Ownership Percentage		50.00%
Business Acquisition, Percentage of Voting Interests Acquired	10.00%

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Note 6 - Investments in Joint Ventures (Tables)

6 Months Ended

Feb. 28, 2013

Schedule of Condensed Balance Sheet [Table Text Block]

	At February 28, 2013
	Total		EXCOR		China		All Other
Current assets	$	61,997,739	$	22,196,110	$	12,442,364	$	27,359,265
Total assets		68,522,275		24,625,927		12,474,170		31,422,178
Current liabilities		19,532,691		3,848,126		5,094,516		10,590,049
Noncurrent liabilities		4,210,364		—		856,978		3,353,386
Joint ventures’ equity		44,779,219		20,777,801		6,522,675		17,478,742
Northern Technologies International Corporation’s share of joint ventures’ equity		22,189,562		10,388,902		3,261,338		8,539,322
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	$	20,075,092	$	10,357,997	$	3,215,436	$	6,501,659

	At August 31, 2012
	Total		EXCOR		NTI ASEAN		All Other
Current assets	$	61,973,725	$	24,357,139	$	15,358,967	$	22,257,619
Total assets		68,585,974		26,620,589		15,522,456		26,442,929
Current liabilities		18,686,181		4,749,574		5,763,857		8,172,750
Noncurrent liabilities		4,700,458		—		1,055965		3,644,493
Joint ventures’ equity		45,199,335		21,871,015		8,702,634		14,625,686
Northern Technologies International Corporation’s share of joint ventures’ equity		21,461,492		10,935,509	$	3,685,404		6,840,579
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	$	19,403,150	$	10,904,604	$	3,314,445	$	5,184,101

Schedule of Condensed Income Statement [Table Text Block]

	Six Months Ended February 28, 2013
	Total		EXCOR		China		All Other
Net sales	$	54,247,135	$	17,451,153	$	6,929,260	$	29,866,722
Gross profit		25,852,537		9,105,579		3,290,660		13,456,298
Net income		4,728,680		3,260,575		524,546		943,559
Northern Technologies International Corporation’s share of equity in income of joint ventures	$	2,292,734	$	1,631,125	$	262,148	$	399,461

	Six Months Ended February 29, 2012
	Total		EXCOR		NTI ASEAN		All Other
Net sales	$	54,792,662	$	16,958,519	$	10,482,144	$	27,351,999
Gross profit		25,945,925		8,860,381		4,705,397		12,380,147
Net income		4,798,435		3,158,682		1,276,056		363,697
Northern Technologies International Corporation’s share of equity in income of joint ventures	$	2,582,355	$	1,576,496	$	692,115	$	313,744

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Note 1 - Interim Financial Information

6 Months Ended

Feb. 28, 2013

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

1.           INTERIM FINANCIAL INFORMATION

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, 2013 and August 31, 2012 and the results of their operations for the three and six months ended February 28, 2013 and February 29, 2012 and their cash flows for the six months ended February 28, 2013 and February 29, 2012, in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP).

Certain amounts reported in the consolidated financial statements for the previous reporting periods have been reclassified to conform to the current period presentation.  These reclassifications did not have a material impact on the Company’s previously reported consolidated balance sheets or statements of cash flows.

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-K for the fiscal year ended August 31, 2012.  These consolidated financial statements also should be read in conjunction with the “Management’s Discussion and Analysis of Financial Condition and Results of Operations” section appearing in this report.

Operating results for the three and six months ended February 28, 2013 are not necessarily indicative of the results that may be expected for the full fiscal year ending August 31, 2013.

The Company evaluates events occurring after the date of the consolidated financial statements requiring recording or disclosure in the consolidated financial statements.

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Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $)	Feb. 28, 2013	Aug. 31, 2012
Trade, allowance (in Dollars)	$ 20,000	$ 20,000
Preferred stock, par value (in Dollars per share)	$ 0	$ 0
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock par value (in Dollars per share)	$ 0.02	$ 0.02
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	4,418,821	4,403,656
Common stock, shares outstanding	4,418,821	4,403,656

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Note 11 - Geographic And Segment Information

6 Months Ended

Feb. 28, 2013

Segment Reporting Disclosure [Text Block]

11.           GEOGRAPHIC AND SEGMENT INFORMATION

Net sales by geographic location as a percentage of total consolidated net sales for the three and six months ended February 28, 2013 and February 29, 2012 were as follows:

	Three Months Ended						Six Months Ended
	February 28, 2013			February 29, 2012			February 28, 2013			February 29, 2012
Inside the U.S.A. to unaffiliated customers		65.6	%		58.9	%		68.4	%		63.3	%
Outside the U.S.A to:
Joint ventures in which the Company is a shareholder directly and indirectly		18.2	%		11.9	%		16.8	%		13.7	%
Unaffiliated customers		16.2	%		29.2	%		14.8	%		23.0	%
		100.0	%		100.0	%		100.0	%		100.0	%

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 months ended February 28, 2013 and February 29, 2012 were as follows:

	Three Months Ended
	February 28, 2013		% of Total Fees for Services Provided to Joint Ventures			February 29, 2012		% of Total Fees for Services Provided to Joint Ventures
China*	$	450,586		25.4	%	$	—		0.0	%
Germany		249,513		14.1	%		251,387		19.4	%
Japan		169,205		9.6	%		214,984		16.6	%
Poland		154,839		8.7	%		130,470		10.1	%
Thailand*		148,303		8.4	%		—		0.0	%
France		147,896		8.3	%		127,004		9.8	%
Korea**		123,388		7.0	%		532		0.0	%
Sweden		77,627		4.4	%		148,277		11.4	%
Finland		72,329		4.1	%		118,911		9.2	%
United Kingdom		35,754		2.0	%		80,639		6.2	%
India		—		0.0	%		163,689		12.6	%
Other		141,441		8.0	%		62,233		4.8	%
	$	1,770,881		100.0	%	$	1,298,126		100.0	%

*  Joint venture owned by NTI Asean.

** Joint venture owned by NTI Asean as of February 28, 2013, but not as of February 29, 2012.  NTI Asean results are not included on the consolidated financial statements for the three months ended February 29, 2012. (See Note 2)

	Six Months Ended
	February 28, 2013		% of Total Fees for Services Provided to Joint Ventures			February 29, 2012		% of Total Fees for Services Provided to Joint Ventures
China*	$	943,897		26.1	%	$	—		0.0	%
Germany		492,213		13.6	%		500,833		18.3	%
Japan		371,186		10.3	%		503,522		18.4	%
Thailand*		301,989		8.4	%		—		0.0	%
France		276,398		7.6	%		268,643		9.8	%
Poland		266,311		7.4	%		228,298		8.3	%
Korea**		262,131		7.2	%		76,997		2.8	%
Sweden		164,619		4.6	%		304,934		11.1	%
Finland		160,180		4.4	%		251,407		9.2	%
United Kingdom		102,812		2.8	%		160,138		5.8	%
India		—		0.0	%		299,844		10.9	%
Other		275,422		7.6	%		148,762		5.4	%
	$	3,617,158		100.0	%	$	2,743,378		100.0	%

*  Joint venture owned by NTI Asean.

** Joint venture owned by NTI Asean as of February 28, 2013, but not as of February 29, 2012.  NTI Asean results are not included on the consolidated financial statements for the six months ended February 29, 2012. (See Note 2)

The following table sets forth the Company’s net sales for the three and six months ended February 28, 2013 and February 29, 2012 by segment:

	Three Months Ended				Six Months Ended
	February 28, 2013		February 29, 2012		February 28, 2013		February 29, 2012
ZERUST® sales	$	4,710,412	$	4,570,779	$	9,505,695	$	9,023,425
Natur-Tec™ sales		535,938		403,549		1,032,402		783,017
	$	5,246,350	$	4,974,328	$	10,538,097	$	9,806,442

The following table sets forth the Company’s cost of goods sold for the three and six months ended February 28, 2013 and February 29, 2012 by segment:

	Three Months Ended										Six Months Ended
	February 28, 2013		% of Product Sales*			February 29, 2012		% of Product Sales*			February 28, 2013		% of Product Sales*			February 29, 2012		% of Product Sales*
Direct cost of goods sold
ZERUST®	$	2,623,070		55.7	%	$	2,569,588		56.2	%	$	5,267,365		55.4	%	$	5,027,387		55.7	%
Natur-Tec®		453,147		84.6	%		361,704		89.6	%		892,820		86.5	%		658,265		84.1	%
Indirect cost of goods sold		557,696		—			548,790		—			1,164,700		—			1,003,906		—
Total net cost of goods sold	$	3,633,913				$	3,480,082				$	7,324,885				$	6,689,558

* 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’s management 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.

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, 2013
	Brazil		North America		Total
Total assets	$	1,456,793	$	43,982,614	$	45,439,407

	At August 31, 2012
	Brazil		North America		Total
Total assets	$	1,744,693	$	40,132,934	$	41,877,627

	Six Months Ended February 28, 2013
	Brazil			North America		Total
Net sales	$	1,131,469		$	9,406,628	$	10,538,097
Operating income	$	(106,759	)	$	1,950,278	$	1,843,519

	Six Months Ended February 29, 2012
	Brazil			North America		Total
Net sales	$	1,216,532		$	8,589,910	$	9,806,442
Operating income	$	(173,651	)	$	1,897,972	$	1,724,321

Total assets located in Brazil primarily consist of cash and cash equivalents, customer receivables and inventory.  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.

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Document And Entity Information	6 Months Ended
	Feb. 28, 2013	Apr. 12, 2013
Document and Entity Information [Abstract]
Entity Registrant Name	Northern Technologies International Corporation
Document Type	10-Q
Current Fiscal Year End Date	--08-31
Entity Common Stock, Shares Outstanding		4,421,870
Amendment Flag	false
Entity Central Index Key	0000875582
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Well-known Seasoned Issuer	No
Document Period End Date	Feb. 28, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2

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Note 12 - Research and Development

6 Months Ended

Feb. 28, 2013

Research, Development, and Computer Software Disclosure [Text Block]

12.           RESEARCH AND DEVELOPMENT

The Company expenses all costs related to product research and development as incurred.   The Company incurred $1,850,599 and $1,789,082 of expense during the six months ended February 28, 2013 and February 29, 2012, respectively, in connection with its research and development activities.  These costs related to product research and development are net of reimbursements related to certain research and development contracts of $137,364 and $228,576 for the six months ended February 28, 2013 and February 29, 2012, respectively.  The net fees are accounted for in the “Research and Development Expenses” section of the consolidated statements of operations.

The Company has certain research and development contracts.  The Company accrues proceeds received under such contracts and offsets research and development expenses incurred in equal installments over the timelines associated with completion of the contracts’ specific objectives and milestones. At February 28, 2013, the Company had $85,418 as a receivable, and as of August 31, 2012, the Company had $96,861 of deferred amounts in other accrued liabilities as the Company had not yet performed under the obligations of the contract at that time.

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Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
NET SALES:
Net sales, excluding joint ventures	$ 4,485,203	$ 4,125,618	$ 9,255,590	$ 8,403,261
Net sales, to joint ventures	761,147	848,710	1,282,507	1,403,181
Total net sales	5,246,350	4,974,328	10,538,097	9,806,442
Cost of goods sold	3,633,913	3,480,082	7,324,885	6,689,558
Gross profit	1,612,437	1,494,246	3,213,212	3,116,884
JOINT VENTURE OPERATIONS:
Equity in income of joint ventures	1,138,438	1,224,675	2,292,734	2,582,355
Fees for services provided to joint ventures	1,770,881	1,298,126	3,617,158	2,743,378
Total joint venture operations	2,909,319	2,522,801	5,909,892	5,325,733
OPERATING EXPENSES:
Selling expenses	1,174,065	1,014,082	2,345,160	2,122,568
General and administrative expenses	1,143,987	1,100,812	2,392,683	2,370,825
Expenses incurred in support of joint ventures	321,456	235,557	691,143	435,821
Research and development expenses	912,393	974,777	1,850,599	1,789,082
Total operating expenses	3,551,901	3,325,228	7,279,585	6,718,296
OPERATING INCOME	969,855	691,819	1,843,519	1,724,321
INTEREST INCOME	22,288	12,631	47,634	20,691
INTEREST EXPENSE	(6,988)	(7,284)	(13,462)	(13,250)
OTHER INCOME		6,825		13,650
INCOME BEFORE INCOME TAX EXPENSE	985,155	703,991	1,877,691	1,745,412
INCOME TAX EXPENSE	240,000	100,000	374,000	206,000
NET INCOME	745,155	603,991	1,503,691	1,539,412
NET INCOME ATTRIBUTABLE TO NON CONTROLLING INTEREST	310,745	(2,202)	679,659	(25,538)
NET INCOME ATTRIBUTABLE TO NTIC	$ 434,410	$ 606,193	$ 824,032	$ 1,564,950
NET INCOME PER COMMON SHARE:
Basic (in Dollars per share)	$ 0.10	$ 0.14	$ 0.19	$ 0.36
Diluted (in Dollars per share)	$ 0.10	$ 0.14	$ 0.18	$ 0.35
WEIGHTED AVERAGE COMMON SHARES ASSUMED OUTSTANDING:
Basic (in Shares)	4,418,821	4,398,356	4,409,954	4,366,932
Diluted (in Shares)	4,485,076	4,466,435	4,460,197	4,440,001

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Note 6 - Investments in Joint Ventures

6 Months Ended

Feb. 28, 2013

Equity Method Investments and Joint Ventures Disclosure [Text Block]

6.           INVESTMENTS IN JOINT VENTURES

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 approximate U.S. GAAP in all material respects.  All material profits recorded on sales from the Company to its joint ventures of goods that remain in inventory, have been eliminated for financial reporting purposes.

Financial information from the audited and unaudited financial statements of the Company’s joint venture in Germany, Excor Korrosionsschutz – Technologien und Produkte GmbH (EXCOR), China, NTI Asean and all of the Company’s other joint ventures, are summarized as follows:

	At February 28, 2013
	Total		EXCOR		China		All Other
Current assets	$	61,997,739	$	22,196,110	$	12,442,364	$	27,359,265
Total assets		68,522,275		24,625,927		12,474,170		31,422,178
Current liabilities		19,532,691		3,848,126		5,094,516		10,590,049
Noncurrent liabilities		4,210,364		—		856,978		3,353,386
Joint ventures’ equity		44,779,219		20,777,801		6,522,675		17,478,742
Northern Technologies International Corporation’s share of joint ventures’ equity		22,189,562		10,388,902		3,261,338		8,539,322
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	$	20,075,092	$	10,357,997	$	3,215,436	$	6,501,659

	At August 31, 2012
	Total		EXCOR		NTI ASEAN		All Other
Current assets	$	61,973,725	$	24,357,139	$	15,358,967	$	22,257,619
Total assets		68,585,974		26,620,589		15,522,456		26,442,929
Current liabilities		18,686,181		4,749,574		5,763,857		8,172,750
Noncurrent liabilities		4,700,458		—		1,055965		3,644,493
Joint ventures’ equity		45,199,335		21,871,015		8,702,634		14,625,686
Northern Technologies International Corporation’s share of joint ventures’ equity		21,461,492		10,935,509	$	3,685,404		6,840,579
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings	$	19,403,150	$	10,904,604	$	3,314,445	$	5,184,101

	Six Months Ended February 28, 2013
	Total		EXCOR		China		All Other
Net sales	$	54,247,135	$	17,451,153	$	6,929,260	$	29,866,722
Gross profit		25,852,537		9,105,579		3,290,660		13,456,298
Net income		4,728,680		3,260,575		524,546		943,559
Northern Technologies International Corporation’s share of equity in income of joint ventures	$	2,292,734	$	1,631,125	$	262,148	$	399,461

	Six Months Ended February 29, 2012
	Total		EXCOR		NTI ASEAN		All Other
Net sales	$	54,792,662	$	16,958,519	$	10,482,144	$	27,351,999
Gross profit		25,945,925		8,860,381		4,705,397		12,380,147
Net income		4,798,435		3,158,682		1,276,056		363,697
Northern Technologies International Corporation’s share of equity in income of joint ventures	$	2,582,355	$	1,576,496	$	692,115	$	313,744

*Prior to September 1, 2012, the Company owned 50% of NTI Asean, which included the joint venture in China, and disclosed its financial information accordingly. On September 1, 2012, the Company obtained an additional 10% ownership interest in NTI Asean and has consolidated the results of NTI Asean subsequent to that date.  As a result the Company now discloses the financial information for only its joint venture in China and not all of NTI Asean accordingly.

The Company records expenses that are directly attributable to the joint ventures on the consolidated statements of operations on the line “Expenses incurred in support of joint ventures”.  The expenses include items such as employee compensation and benefit expenses, travel expense and consulting expense.

The Company did not make any other joint venture investments during the six months ended February 28, 2013 and February 29, 2012.

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Note 5 - Patents and Trademarks, Net

6 Months Ended

Feb. 28, 2013

Intangible Assets Disclosure [Text Block]

5.           PATENTS AND TRADEMARKS, NET

Patents and trademarks, net consisted of the following:

	February 28, 2013			August 31, 2012
Patents and trademarks	$	2,045,102		$	1,945,785
Less accumulated amortization		(1,018,005	)		(984,604	)
	$	1,027,097		$	961,181

Patent and trademark costs are amortized over seven years.  Costs incurred related to patents and trademarks are capitalized until filed and approved, at which time the amounts capitalized to date are amortized and any further costs, including maintenance costs, are expensed as incurred.  Amortization expense is estimated to approximate $80,000 in each of the next five fiscal years.

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Note 5 - Patents and Trademarks, Net (Tables)

6 Months Ended

Feb. 28, 2013

Schedule of Finite-Lived Intangible Assets [Table Text Block]

	February 28, 2013			August 31, 2012
Patents and trademarks	$	2,045,102		$	1,945,785
Less accumulated amortization		(1,018,005	)		(984,604	)
	$	1,027,097		$	961,181

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Note 13 - Commitments and Contingencies

6 Months Ended

Feb. 28, 2013

Commitments and Contingencies Disclosure [Text Block]

13.           COMMITMENTS AND CONTINGENCIES

On August 31, 2012, the Board of Directors of the Company, upon recommendation of the Compensation Committee of the Board of Directors, approved the material terms of an annual bonus plan for the Company’s executive officers and certain officers and employees for the fiscal year ending August 31, 2013.  For fiscal 2013 as in past years, the total amount available under the bonus plan will be up to 25% of the Company’s earnings before interest, taxes and other income, as adjusted to take into account amounts to be paid under the bonus plan and certain other adjustments (Adjusted EBITOI), assuming the achievement of at least a minimum Adjusted EBITOI, which is generally 70% of a budgeted target Adjusted EBITOI for fiscal 2013.  For each plan participant, 50% of the amount of the participant’s individual bonus payout will be determined based upon the participant’s individual allocation percentage of the total amount available under the bonus plan and 50% of the participant’s payout will be determined based upon the participant’s achievement of certain pre-established but more qualitative individual performance objectives.  The payment of bonuses under the plan are discretionary and may be paid to executive officer participants in both cash and shares of NTIC common stock, the exact amount and percentages of which will be determined by the Company’s Board of Directors, upon recommendation of the Compensation Committee, after the completion of the Company’s consolidated financial statements for fiscal 2013.  There was $275,000 for management bonuses accrued for six months ended February 28, 2013 compared to a management bonus accrual of $542,720 for the six months ended February 29, 2012.

The Company leases property with future lease payments as follows: fiscal 2013 - $119,250; fiscal 2014 - $59,500 and thereafter - $0.

Three joint ventures accounted for 54.2% and 55.3% of the Company’s trade joint venture receivables at February 28, 2013 and August 31, 2012, respectively.

From time to time, the Company is subject to various claims and legal actions in the ordinary course of its business.  The Company is not currently involved in any legal proceeding in which the Company believes, based on information currently available, that there is a reasonable possibility of a material loss.

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Note 9 - Net Income Per Common Share

6 Months Ended

Feb. 28, 2013

Earnings Per Share [Text Block]

9.           NET INCOME PER COMMON SHARE

Basic net income per common share is computed by dividing net income 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.

Options to purchase shares of common stock of 48,000 were excluded from the computation of common share equivalents for the three and six months ended February 28, 2013, as the exercise prices of such options were greater than market price of a share of common stock.  Options to purchase shares of common stock of 26,000 were excluded from the computation of common share equivalents for the three and six months ended February 29, 2012, as the exercise prices of such options were greater than market price of a share of common stock.

The following is a reconciliation of the earnings per share computation for the three and six months ended February 28, 2013 and February 29, 2012:

	Three Months Ended				Six Months Ended
Numerators:	February 28, 2013		February 29, 2012		February 28, 2013		February 29, 2012
Net income attributable to NTIC	$	434,410	$	606,193	$	824,032	$	1,564,950
Denominator:
Basic – weighted shares outstanding		4,418,821		4,398,356		4,409,954		4,366,932
Weighted shares assumed upon exercise of stock options		66,255		68,079		50,243		73,069
Diluted – weighted shares outstanding		4,485,076		4,466,435		4,460,197		4,440,001
Basic earnings per share:	$	0.10	$	0.14	$	0.19	$	0.36
Diluted earnings per share:	$	0.10	$	0.14	$	0.18	$	0.35

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.

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Note 7 - Corporate Debt

6 Months Ended

Feb. 28, 2013

Debt Disclosure [Text Block]

7.           CORPORATE DEBT

As of February 28, 2013, Northern Technologies Holding Company, LLC (NTI LLC) had a term loan with a principal amount of $971,474 outstanding that NTI LLC obtained from PNC Bank, National Association (PNC Bank) in connection with the purchase of NTIC’s corporate headquarters in September 2006.  The term loan matures on January 10, 2016, bears interest at an annual rate based on the daily LIBOR rate plus 2.15% and is payable in consecutive monthly installments equal to approximately $6,343 (inclusive of principal but exclusive of interest).  The term loan is secured by a first lien on the real estate and building owned by NTI LLC and all of the assets of the Company and is guaranteed by the  Company.

The Company has a revolving line of credit with PNC Bank of $3,000,000.  No amounts were outstanding under the line of credit as of February 28, 2013 and August 31, 2012.  At the option of the Company, outstanding advances under the line of credit bear interest at either (a) an annual rate based on LIBOR plus 2.15% for the applicable LIBOR interest period selected by the Company or (b) at the rate publicly announced by PNC Bank from time to time as its prime rate. Interest is payable in arrears (a) for the portion of advances bearing interest under the prime rate on the last day of each month during the term thereof and (b) for the portion of advances bearing interest under the LIBOR option on the last day of the respective LIBOR interest period selected for such advance.  Any unpaid interest is payable on the maturity date.  As of February 28, 2013, the interest rate was 2.93% and the weighted average rate was 3.04% for the six months ended February 28, 2013.  As of February 29, 2012, the interest rate was 3.24% and the weighted average rate was 3.13% for the six months ended February 29, 2012.  The revolving line of credit is secured by cash, receivables and inventory.

The term loan and the line of credit are governed under separate loan agreements (collectively, the Loan Agreements).  The Loan Agreements contain standard covenants, including affirmative financial covenants, such as the maintenance of a minimum fixed charge coverage ratio, and negative covenants, which, among other things, limit the incurrence of additional indebtedness, loans and equity investments, disposition of assets, mergers and consolidations and other matters customarily restricted in such agreements. Under the Loan Agreements, the Company is subject to a minimum fixed charge coverage ratio of 1.10:1.00.  As of February 28, 2013, the Company was in compliance with all debt covenants.

On December 11, 2012, PNC Bank extended the maturity date of the line of credit from January 9, 2013 to January 8, 2014, and waived a technical covenant default by the Company to deliver quarterly compliance certificates.  All other terms of the line of credit and the loan agreement and other documents evidencing the line of credit remain the same.

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Note 8 - Stockholders' Equity

6 Months Ended

Feb. 28, 2013

Stockholders' Equity Note Disclosure [Text Block]

8.           STOCKHOLDERS’ EQUITY

During the six months ended February 28, 2013, the Company did not purchase or retire any shares of its common stock.  The following stock options to purchase shares of common stock were exercised during the six months ended February 28, 2013:

Options Exercised	Exercise Price
25,140	$9.95
1,734	7.65

The Company granted stock options under the Northern Technologies International Corporation Amended and Restated 2007 Stock Incentive Plan (the 2007 Plan) to purchase an aggregate of 118,294 shares of its common stock to various employees and directors during the six months ended February 28, 2013.  The weighted average per share exercise price of the stock options is $10.25, which is equal to the fair market value of the Company’s common stock on the date of grant.

During the six months ended February 29, 2012, the Company did not purchase or retire any shares of its common stock.  The following stock options to purchase shares of common stock were exercised during the six months ended February 29, 2012:

Options Exercised	Exercise Price
1,966	$           7.65

The Company granted stock options under the 2007 Plan to purchase an aggregate of 26,000 shares of its common stock to various employees and directors during the six months ended February 29, 2012.  The weighted average per share exercise price of the stock options is $16.45, which is equal to the fair market value of the Company’s common stock on the date of grant.

During the six months ended February 29, 2012, the Company paid stock bonuses under the 2007 Plan for an aggregate of 42,707 shares of its common stock to various employees at a grant price of $14.42 per share.  The aggregate fair value of the shares of the Company’s common stock as of the date of payment of the stock bonuses was $615,830, based on the closing sale price of a share of the Company’s common stock on the date of payment. The fair value of common stock granted during the six months ended February 29, 2012 was based on fiscal 2011 performance and was included in accrued liabilities at August 31, 2011.

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Note 10 - Stock-Based Compensation

6 Months Ended

Feb. 28, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

10.           STOCK-BASED COMPENSATION

The Company has two stock-based compensation plans under which stock options and other stock-based awards have been granted, including the Northern Technologies International Corporation Amended and Restated 2007 Stock Incentive Plan and the Northern Technologies International Corporation Employee Stock Purchase Plan (the ESPP).  The Compensation Committee of the Board of Directors and the Board of Directors administers these plans.

The 2007 Plan provides for the grant of incentive stock options, non-statutory stock options, stock appreciation rights, restricted stock, stock unit awards, performance awards and stock bonuses to eligible recipients to enable the Company and its subsidiaries to attract and retain qualified individuals through opportunities for equity participation in the Company, and to reward those individuals who contribute to the achievement of the Company’s economic objectives.  Subject to adjustment as provided in the 2007 Plan, up to a maximum of 800,000 shares of the Company’s common stock are issuable under the 2007 Plan.  Options granted under the 2007 Plan generally have a term of five years and become exercisable over a three- or four-year period beginning on the one-year anniversary of the date of grant.  Options are granted at per share exercise prices equal to the market value of the Company’s common stock on the date of grant.  To date, only stock options and stock bonuses have been granted under the 2007 Plan.

The maximum number of shares of common stock of the Company available for issuance under the ESPP is 100,000 shares, subject to adjustment as provided in the ESPP.  The ESPP provides for six-month offering periods beginning on September 1 and March 1 of each year.  The purchase price of the shares is 90% of the lower of the fair market value of common stock at the beginning or end of the offering period.  This discount may not exceed the maximum discount rate permitted for plans of this type under Section 423 of the Internal Revenue Code of 1986, as amended.  The ESPP is compensatory for financial reporting purposes.

The Company granted options to purchase an aggregate of 118,294 and 26,000 shares of its common stock during the six months ended February 28, 2013 and February 29, 2012, respectively.  The fair value of option grants is determined at date of grant, using the Black-Scholes option pricing model with the assumptions listed below.  Based on these valuations, the Company recognized compensation expense of $137,550 and $145,046 during the six months ended February 28, 2013 and February 29, 2012, respectively, related to the options that vested during such time period.  The stock-based expense recorded reduced after-tax net income per share by $0.03 for each of the six months ended February 28, 2013 and February 29, 2012, respectively.  As of February 28, 2013, the total compensation cost for non-vested options not yet recognized in the Company’s consolidated statements of operations was $478,992 net of estimated forfeitures.  Additional stock-based compensation expense of $173,220 is expected through the remainder of fiscal year 2013, and expense of $185,815 and $99,964 is expected to be recognized during fiscal 2014 and fiscal 2015, respectively.  Future option grants will impact the compensation expense recognized.

The Company currently estimates a ten percent forfeiture rate for stock options and continually reviews this estimate for future periods.

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:

	February 28, 2013			February 29, 2012
Dividend yield		0.00%			0.00	%
Expected volatility		48.0%			48.8	%
Expected life of option (years)	5	-	10		5
Average risk-free interest rate		0.71%			1.31	%

The weighted average per share fair value of options granted during six months ended February 28, 2013 and February 29, 2012 was $5.53 and $7.14, respectively.  The weighted average remaining contractual life of the options outstanding as of February 28, 2013 and February 29, 2012 was 4.58 years and 2.07 years, respectively.

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Note 5 - Patents and Trademarks, Net (Detail) (USD $)	6 Months Ended
	Feb. 28, 2013
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	80,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	80,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	80,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	80,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	80,000
Patents and Trademarks [Member]
Finite-Lived Intangible Asset, Useful Life	7 years

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Note 11 - Geographic And Segment Information (Detail) - Operating income by geographic distribution: (USD $)	3 Months Ended		6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
Net sales	$ 5,246,350	$ 4,974,328	$ 10,538,097	$ 9,806,442
Operating income	969,855	691,819	1,843,519	1,724,321
Brazil [Member]
Net sales			1,131,469	1,216,532
Operating income			(106,759)	(173,651)
North America [Member]
Net sales			9,406,628	8,589,910
Operating income			$ 1,950,278	$ 1,897,972

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Note 3 - Inventories (Tables)

6 Months Ended

Feb. 28, 2013

Schedule of Inventory, Current [Table Text Block]

	February 28, 2013		August 31, 2012
Production materials	$	952,997	$	1,462,615
Finished goods		4,200,534		2,688,582
	$	5,153,531	$	4,151,197

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Note 9 - Net Income Per Common Share (Tables)

6 Months Ended

Feb. 28, 2013

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended				Six Months Ended
Numerators:	February 28, 2013		February 29, 2012		February 28, 2013		February 29, 2012
Net income attributable to NTIC	$	434,410	$	606,193	$	824,032	$	1,564,950
Denominator:
Basic – weighted shares outstanding		4,418,821		4,398,356		4,409,954		4,366,932
Weighted shares assumed upon exercise of stock options		66,255		68,079		50,243		73,069
Diluted – weighted shares outstanding		4,485,076		4,466,435		4,460,197		4,440,001
Basic earnings per share:	$	0.10	$	0.14	$	0.19	$	0.36
Diluted earnings per share:	$	0.10	$	0.14	$	0.18	$	0.35

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Note 11 - Geographic And Segment Information (Detail) - Cost of Goods Sold By Segment: (USD $)	3 Months Ended				6 Months Ended
	Feb. 28, 2013		Feb. 29, 2012		Feb. 28, 2013		Feb. 29, 2012
Direct cost of goods sold
Cost of Goods Sold	$ 3,633,913		$ 3,480,082		$ 7,324,885		$ 6,689,558
ZERUST [Member] | Direct Cost of Goods Sold [Member]
Direct cost of goods sold
Cost of Goods Sold	2,623,070		2,569,588		5,267,365		5,027,387
% of Product Sales	55.70%	[1]	56.20%	[1]	55.40%	[1]	55.70%	[1]
Natur-Tec [Member] | Direct Cost of Goods Sold [Member]
Direct cost of goods sold
Cost of Goods Sold	453,147		361,704		892,820		658,265
% of Product Sales	84.60%	[1]	89.60%	[1]	86.50%	[1]	84.10%	[1]
Indirect Cost of Goods Sold [Member]
Direct cost of goods sold
Cost of Goods Sold	$ 557,696		$ 548,790		$ 1,164,700		$ 1,003,906

[1] 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.

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Note 8 - Stockholders' Equity (Detail) - Exercised Stock Options: (USD $)	6 Months Ended
	Feb. 29, 2012	Feb. 28, 2013 Exercise 1 [Member]	Feb. 28, 2013 Exercise 2 [Member]
Options Exercised	1,966	25,140	1,734
Exercise Price (in Dollars per share)	$ 7.65	$ 9.95	$ 7.65

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Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
NET INCOME	$ 745,155	$ 603,991	$ 1,503,691	$ 1,539,412
OTHER COMPREHENSIVE INCOME (LOSS) – FOREIGN CURRENCY TRANSLATION ADJUSTMENT	(25,641)	(65,805)	395,544	(1,253,876)
COMPREHENSIVE INCOME (LOSS)	719,514	538,186	1,899,235	285,536
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO NONCONTROLLING INTERESTS	331,252	300	734,687	(32,842)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO STOCKHOLDERS	$ 388,262	$ 537,886	$ 1,164,548	$ 318,378

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Note 4 - Property and Equipment, Net

6 Months Ended

Feb. 28, 2013

Property, Plant and Equipment Disclosure [Text Block]

4.           PROPERTY AND EQUIPMENT, NET

Property and equipment, net consisted of the following:

	February 28, 2013			August 31, 2012
Land	$	310,365		$	310,365
Buildings and improvements		3,556,041			3,406,674
Machinery and equipment		2,861,709			2,908,021
		6,728,115			6,625,060
Less accumulated depreciation		(2,545,380	)		(2,336,442	)
	$	4,182,735		$	4,288,618

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Note 10 - Stock-Based Compensation (Tables)

6 Months Ended

Feb. 28, 2013

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	February 28, 2013			February 29, 2012
Dividend yield		0.00%			0.00	%
Expected volatility		48.0%			48.8	%
Expected life of option (years)	5	-	10		5
Average risk-free interest rate		0.71%			1.31	%

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Note 6 - Investments in Joint Ventures (Detail) - Condensed Income Statement of EXCOR and NTI ASEAN, and All Other Joint Ventures: (USD $)	3 Months Ended		6 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
Net sales			$ 54,247,135	$ 54,792,662
Gross profit			25,852,537	25,945,925
Net income			4,728,680	4,798,435
Northern Technologies International Corporation’s share of equity in income of joint ventures	1,138,438	1,224,675	2,292,734	2,582,355
EXCOR [Member]
Net sales			17,451,153	16,958,519
Gross profit			9,105,579	8,860,381
Net income			3,260,575	3,158,682
Northern Technologies International Corporation’s share of equity in income of joint ventures			1,631,125	1,576,496
China [Member]
Net sales			6,929,260
Gross profit			3,290,660
Net income			524,546
Northern Technologies International Corporation’s share of equity in income of joint ventures			262,148
All Other [Member]
Net sales			29,866,722	27,351,999
Gross profit			13,456,298	12,380,147
Net income			943,559	363,697
Northern Technologies International Corporation’s share of equity in income of joint ventures			399,461	313,744
NTI ASEAN [Member]
Net sales				10,482,144
Gross profit				4,705,397
Net income				1,276,056
Northern Technologies International Corporation’s share of equity in income of joint ventures				$ 692,115

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Note 2 - NTI ASEAN (Tables)

6 Months Ended

Feb. 28, 2013

Schedule of Purchase Price Allocation [Table Text Block]

Net assets acquired (liabilities assumed):
Cash and cash equivalents	$	1,613,000
Accounts receivables		1,342,000
Investments in joint ventures		4,967,000
Value of assets	$	7,922,000
Purchase price:
Fair value of non-controlling interest	$	3,961,000
Value of previously held interest		3,961,000
Total consideration	$	7,922,000

Business Acquisition, Pro Forma Information [Table Text Block]

				NTI			Eliminated in
	As Reported			Asean			Consolidation			Pro Forma
Net sales	$	4,974,328		$	—		$	—		$	4,974,328
Cost of goods sold		3,480,082			—			—			3,480,082
Gross profit		1,494,246			—			—			1,494,246
Joint venture operations		2,522,801			868,382			(322,654	)		3,068,529
Operating expenses		3,325,228			20,470			—			3,345,698
Operating income		691,819			847,912			(322,654	)		1,217,077
Income before income tax expense		703,991			847,912			(322,654	)		1,229,249
Income tax expense		100,000			95,500			—			195,500
Net income		603,991			752,412			(322,654	)		1,033,749
Net income attributable to non-controlling interest		(2,202	)		(300,965	)		—			(303,167	)
Net income attributable to NTIC		606,193			451,447			(322,654	)		734,804
Net income per common diluted share	$	0.13		$	0.10		$	(0.08	)	$	0.16

				NTI			Eliminated in
	As Reported			Asean			Consolidation			Pro Forma
Net sales	$	9,806,442		$	—		$	—		$	9,806,442
Cost of goods sold		6,689,558			—			—			6,689,558
Gross profit		3,116,884			—			—			3,116,884
Joint venture operations		5,325,733			1,699,280			(692,115	)		6,332,898
Operating expenses		6,718,296			23,135			—			6,741,431
Operating income		1,724,321			1,676,145			(692,115	)		2,708,351
Income before income tax expense		1,745,412			1,676,145			(692,115	)		2,729,442
Income tax expense		206,000			184,811			—			390,811
Net income		1,539,412			1,491,334			(692,115	)		2,338,631
Net income attributable to non-controlling interest		(25,538	)		(596,534	)		—			(622,072	)
Net income attributable to NTIC		1,564,950			894,800			(692,115	)		1,767,635
Net income per common diluted share	$	0.35		$	0.20		$	(0.16	)	$	0.40