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v3.23.2

Note 6 - Investments in Joint Ventures - Condensed Income Statement of EXCOR and All Other Joint Ventures (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
May 31, 2023 | May 31, 2022 | May 31, 2023 | May 31, 2022
Net sales | $ 20,969,726 | $ 18,964,921 | $ 59,193,317 | $ 53,906,973
Gross profit | 7,689,142 | 6,242,088 | 20,445,452 | 16,929,353
Net income | 1,525,596 | 1,000,167 | 2,913,086 | 5,676,773
Northern Technologies International Corporation’s share of equity in income from joint ventures | 1,346,658 | 1,364,597 | 3,664,793 | 3,662,178
EXCOR and All Other Joint Venturs [Member] |  |  |  |
Northern Technologies International Corporation’s share of equity in income from joint ventures | 1,346,658 | 1,364,597 | 3,664,793 | 3,662,178
Northern Technologies International Corporation's dividends received from joint ventures | 45,977 | 252,000 | 3,510,716 | 5,723,176
EXCOR [Member] |  |  |  |
Northern Technologies International Corporation’s share of equity in income from joint ventures | 828,631 | 824,784 | 2,376,575 | 2,324,605
Northern Technologies International Corporation's dividends received from joint ventures | 0 | 0 | 2,459,500 | 4,255,200
All Other [Member] |  |  |  |
Northern Technologies International Corporation’s share of equity in income from joint ventures | 518,027 | 539,813 | 1,288,218 | 1,337,572
Northern Technologies International Corporation's dividends received from joint ventures | 45,977 | 252,000 | 1,051,216 | 1,467,976
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] |  |  |  |
Net sales | 26,312,548 | 26,594,077 | 76,525,427 | 78,218,839
Gross profit | 10,494,244 | 10,626,570 | 30,223,623 | 31,504,531
Net income | 2,692,444 | 2,714,979 | 7,308,398 | 7,344,175
EXCOR [Member] |  |  |  |
Net sales | 10,735,862 | 10,397,916 | 30,590,265 | 31,010,578
Gross profit | 5,085,837 | 4,990,697 | 14,539,314 | 15,118,133
Net income | 1,654,151 | 1,654,389 | 4,761,608 | 4,646,123
All Other [Member] |  |  |  |
Net sales | 15,576,686 |  | 45,935,162 | 47,208,261
Gross profit | 5,408,407 |  | 15,684,309 | 16,386,398
Net income | $ 1,038,293 |  | $ 2,546,790 | $ 2,698,052
Joint Ventures in France [Member] |  |  |  |
Net sales |  | 16,196,160 |  |
Gross profit |  | 5,635,873 |  |
Net income |  | $ 1,060,590 |  |

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