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v3.22.2.2

Note 7 - Investments in Joint Ventures - Condensed Income Statement of EXCOR and All Other Joint Ventures (Details) - USD ($) | 12 Months Ended
--- | ---
Aug. 31, 2022 | Aug. 31, 2021
Net sales by segment |  | $ 74,158,890 | $ 56,493,819
Gross profit |  | 23,068,592 | 19,573,005
Net income attributable to NTIC |  | 6,324,700 | 6,281,238
Northern Technologies International Corporation’s share of equity in income of joint ventures |  | 4,725,918 | 7,465,214
EXCOR and All Other Joint Venturs [Member] |  |  |
Northern Technologies International Corporation’s share of equity in income of joint ventures |  | 4,725,918 | 7,465,214
Northern Technologies International Corporation’s dividends received from joint ventures |  | 5,723,176 | 3,665,365
EXCOR [Member] |  |  |
Northern Technologies International Corporation’s share of equity in income of joint ventures |  | 3,236,989 | 4,400,403
Northern Technologies International Corporation’s dividends received from joint ventures |  | 4,255,200 | 1,809,900
All Other [Member] |  |  |
Northern Technologies International Corporation’s share of equity in income of joint ventures |  | 1,488,929 |
Northern Technologies International Corporation’s dividends received from joint ventures |  | 1,467,976 |
Joint Ventures in France [Member] |  |  |
Northern Technologies International Corporation’s share of equity in income of joint ventures |  |  | 3,064,811
Northern Technologies International Corporation’s dividends received from joint ventures | [1] |  | 1,855,465
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] |  |  |
Net sales by segment |  | 104,077,748 | 120,954,550
Gross profit |  | 41,030,647 | 53,371,610
Net income attributable to NTIC |  | 9,302,237 | 14,921,531
EXCOR [Member] |  |  |
Net sales by segment |  | 42,853,162 | 46,522,688
Gross profit |  | 20,312,400 | 25,389,981
Net income attributable to NTIC |  | 6,487,855 | 8,798,995
All Other [Member] |  |  |
Net sales by segment |  | 61,224,586 |
Gross profit |  | 20,718,247 |
Net income attributable to NTIC |  | $ 2,814,382 |
Joint Ventures in France [Member] |  |  |
Net sales by segment | [1] |  | 74,431,862
Gross profit | [1] |  | 27,981,629
Net income attributable to NTIC | [1] |  | $ 6,122,536
[1] | Includes Zerust India since Zerust India was not a consolidated subsidiary of the Company as of August 31, 2021 or May 31, 2021. See Note 3 entitled “Business Combination.”

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