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Note 6 - Investments in Joint Ventures - Condensed Balance Sheet of EXCOR and All Other Joint Ventures (Details) - USD ($) | Feb. 29, 2024 | Aug. 31, 2023
--- | --- | ---
Current assets | $ 37,333,314 | $ 39,671,556
Total assets | 87,307,250 | 89,344,303
Current liabilities | 13,357,855 | 16,721,372
Noncurrent liabilities | 2,001,388 | 1,924,134
Joint ventures’ equity | 68,352,579 | 66,356,273
Investments in joint ventures | 23,460,869 | 23,705,714
EXCOR and All Other Joint Venturs [Member] |  |
Investments in joint ventures | 23,460,869 | 23,705,714
NTIC’s share of joint ventures’ undistributed earnings | 23,645,685 | 20,493,861
EXCOR [Member] |  |
Investments in joint ventures | 13,224,802 | 13,683,608
NTIC’s share of joint ventures’ undistributed earnings | 14,260,800 | 12,075,524
All Other [Member] |  |
Investments in joint ventures | 10,236,067 | 10,022,106
NTIC’s share of joint ventures’ undistributed earnings | 9,384,885 | 8,418,337
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] |  |
Current assets | 56,241,025 | 55,339,662
Total assets | 60,974,536 | 59,729,348
Current liabilities | 13,269,055 | 11,464,247
Noncurrent liabilities | 399,445 | 323,762
Joint ventures’ equity | 47,306,036 | 47,941,339
EXCOR [Member] |  |
Current assets | 26,949,248 | 27,862,458
Total assets | 29,383,315 | 30,054,277
Current liabilities | 2,933,713 | 2,687,064
Noncurrent liabilities | 0 | 0
Joint ventures’ equity | 26,449,601 | 27,367,213
Joint Ventures in France [Member] |  |
Current assets |  | 27,477,204
Total assets |  | 29,675,071
Current liabilities |  | 8,777,183
Noncurrent liabilities |  | 323,762
Joint ventures’ equity |  | $ 20,574,126
All Other [Member] |  |
Current assets | 29,291,777 |
Total assets | 31,591,221 |
Current liabilities | 10,335,342 |
Noncurrent liabilities | 399,445 |
Joint ventures’ equity | $ 20,856,435 |

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