Note 8 - Stockholders' Equity	3 Months Ended
Nov. 30, 2018
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	8. STOCKHOLDERS’ EQUITY On October 24, 2018, the Company’s Board of Directors declared a cash dividend of $0.12 per share of NTIC’s common stock, payable on November 21, 2018 to stockholders of record on November 7, 2018 . On November 20, 2017, the Company’s Board of Directors declared a cash dividend of $0.10 per share of NTIC’s common stock, payable on December 21, 2018 to stockholders of record on December 8, 2018 . During the three months ended November 30, 2018 and 2017, the Company repurchased no shares of its common stock. 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 70,884 shares of its common stock to various employees and directors during the three months ended November 30, 2018. The weighted average per share exercise price of the stock options is $36.45, which was equal to the fair market value of the Company’s common stock on the date of grant. During the three months ended November 30, 2018, no stock options to purchase common stock were exercised. The Company granted stock options under the 2007 Plan to purchase an aggregate of 47,252 shares of its common stock to various employees and directors during the three months ended November 30, 2017. The weighted average per share exercise price of the stock options is $18.35, which was equal to the fair market value of the Company’s common stock on the date of grant. During the three months ended November 30, 2017, stock options to purchase an aggregate of 1,500 shares of common stock were exercised at a weighted average exercise price of $10.25 per share. The Company issued 874 and 891 shares of common stock on September 1, 2018 and 2017, respectively, under the Northern Technologies International Corporation Employee Stock Purchase Plan (the ESPP). The Company held its 2018 Annual Meeting of Stockholders ( 2018 Annual Meeting) on January 12, 2018. At the 2018 Annual Meeting, a proposal to approve an amendment to the Company’s Restated Certificate of Incorporation to increase the Company’s authorized shares of common stock from 10,000,000 to 15,000,000 (Share Increase Amendment) was approved by the Company’s stockholders by the required vote. The Share Increase Amendment was filed with the Office of the Secretary of State of the State of Delaware on January 16, 2018 and it became effective the same day. In determining that the Share Increase Amendment was approved by the required vote, votes cast by brokers, banks or other nominees without instruction from the beneficial owners of certain of our outstanding shares were counted in favor of the proposal in accordance with the rules of the New York Stock Exchange that govern how brokers may cast such votes. Because a disclosure in the definitive proxy statement for the 2018 Annual Meeting, which was filed on Schedule 14A with the Securities and Exchange Commission (SEC) on November 27, 2017 ( 2018 Proxy Statement), anticipated that brokers would not have discretion to vote for the proposal to approve the Share Increase Amendment, a question has been raised as to the validity of the vote taken on the proposal to approve the Share Increase Amendment. The Company believes that the Share Increase Amendment was properly approved and is effective. However, because the description of the authority of brokers to vote on proposals without instruction in the 2018 Proxy Statement may create some uncertainty as to the effect of the vote obtained at the 2018 Annual Meeting and out of an abundance of caution, the Company is asking its stockholders at the 2019 Annual Meeting of Stockholders scheduled to be held on January 18, 2019 to ratify the filing and effectiveness of the Share Increase Amendment pursuant to Delaware law in order to eliminate any uncertainty related to the effectiveness of the Share Increase Amendment. The Company has not issued, or reserved for issuance, and will not issue, or reserve for issuance, any of the additional 5,000,000 authorized shares as part of the Share Increase Amendment unless the vote at the 2019 Annual Meeting of Stockholders is in favor of the ratification of the Share Increase Amendment.

STOCKHOLDERS’ EQUITY

October 24, 2018,

the Company’s Board of Directors declared a cash dividend of

$0.12

per share of NTIC’s common stock, payable on

November 21, 2018

to stockholders of record on

November 7, 2018

November 20, 2017,

the Company’s Board of Directors declared a cash dividend of

$0.10

per share of NTIC’s common stock, payable on

December 21, 2018

to stockholders of record on

December 8, 2018

During the

three

months ended

November 30, 2018

and

2017,

the Company repurchased

shares of its common stock.

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

70,884

shares of its common stock to various employees and directors during the

three

months ended

November 30, 2018.

The weighted average per share exercise price of the stock options is

$36.45,

which was equal to the fair market value of the Company’s common stock on the date of grant. During the

three

months ended

November 30, 2018,

stock options to purchase common stock were exercised.

The Company granted stock options under the

2007

Plan to purchase an aggregate of

47,252

shares of its common stock to various employees and directors during the

three

months ended

November 30, 2017.

The weighted average per share exercise price of the stock options is

$18.35,

which was equal to the fair market value of the Company’s common stock on the date of grant. During the

three

months ended

November 30, 2017,

stock options to purchase an aggregate of

1,500

shares of common stock were exercised at a weighted average exercise price of

$10.25

per share.

The Company issued

874

and

891

shares of common stock on

September 1, 2018

and

2017,

respectively, under the Northern Technologies International Corporation Employee Stock Purchase Plan (the ESPP).

The Company held its

2018

Annual Meeting of Stockholders (

2018

Annual Meeting) on

January 12, 2018.

At the

2018

Annual Meeting, a proposal to approve an amendment to the Company’s Restated Certificate of Incorporation to increase the Company’s authorized shares of common stock from

10,000,000

15,000,000

(Share Increase Amendment) was approved by the Company’s stockholders by the required vote. The Share Increase Amendment was filed with the Office of the Secretary of State of the State of Delaware on

January 16, 2018

and it became effective the same day. In determining that the Share Increase Amendment was approved by the required vote, votes cast by brokers, banks or other nominees without instruction from the beneficial owners of certain of our outstanding shares were counted in favor of the proposal in accordance with the rules of the New York Stock Exchange that govern how brokers

may

cast such votes. Because a disclosure in the definitive proxy statement for the

2018

Annual Meeting, which was filed on Schedule

14A

with the Securities and Exchange Commission (SEC) on

November 27, 2017 (

2018

Proxy Statement), anticipated that brokers would

not

have discretion to vote for the proposal to approve the Share Increase Amendment, a question has been raised as to the validity of the vote taken on the proposal to approve the Share Increase Amendment. The Company believes that the Share Increase Amendment was properly approved and is effective. However, because the description of the authority of brokers to vote on proposals without instruction in the

2018

Proxy Statement

may

create some uncertainty as to the effect of the vote obtained at the

2018

Annual Meeting and out of an abundance of caution, the Company is asking its stockholders at the

2019

Annual Meeting of Stockholders scheduled to be held on

January 18, 2019

to ratify the filing and effectiveness of the Share Increase Amendment pursuant to Delaware law in order to eliminate any uncertainty related to the effectiveness of the Share Increase Amendment. The Company has

not

issued, or reserved for issuance, and will

not

issue, or reserve for issuance, any of the additional

5,000,000

authorized shares as part of the Share Increase Amendment unless the vote at the

2019

Annual Meeting of Stockholders is in favor of the ratification of the Share Increase Amendment.