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Note 7 - Investments in Joint Ventures - Condensed Income Statement of EXCOR and All Other Joint Ventures (Details) - USD ($) | 3 Months Ended
--- | ---
Nov. 30, 2024 | Nov. 30, 2023
Net sales | $ 21,338,393 | $ 20,181,675
Gross profit | 8,162,953 | 7,334,274
Net income | 561,091 | 895,521
NTIC’s share of equity in income from joint ventures | 1,129,593 | 1,102,241
EXCOR and All Other Joint Venturs [Member] |  |
Net income | 2,259,187 | 2,204,482
NTIC’s share of equity in income from joint ventures | 1,129,593 | 1,102,241
NTIC’s dividends received from joint ventures | 0 | 371,104
EXCOR [Member] |  |
Net income | 1,247,500 | 1,026,907
NTIC’s share of equity in income from joint ventures | 623,750 | 513,453
NTIC’s dividends received from joint ventures | 0 | 0
All Other [Member] |  |
Net income | 1,011,687 | 1,177,575
NTIC’s share of equity in income from joint ventures | 505,843 | 588,788
NTIC’s dividends received from joint ventures | 0 | 371,104
EXCOR and All Other Joint Venturs [Member] |  |
Net sales | 23,837,010 | 23,560,661
Gross profit | 10,315,283 | 10,103,800
EXCOR [Member] |  |
Net sales | 8,738,814 | 8,420,960
Gross profit | 4,757,686 | 4,375,075
All Other [Member] |  |
Net sales | 15,098,196 | 15,139,701
Gross profit | $ 5,557,597 | $ 5,728,725

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