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Note 7 - Investments in Joint Ventures - Condensed Balance Sheet of EXCOR and All Other Joint Ventures (Details) - USD ($) | Nov. 30, 2024 | Aug. 31, 2024
--- | --- | ---
Current assets | $ 40,302,350 | $ 41,579,219
Total assets | 94,037,655 | 94,676,502
Current liabilities | 18,118,922 | 17,896,943
Non-current liabilities | 1,611,684 | 1,604,238
Joint ventures’ equity | 70,213,332 | 71,193,991
Investments in joint ventures | 25,492,921 | 25,397,287
EXCOR and All Other Joint Venturs [Member] |  |
Investments in joint ventures | 25,493,228 | 25,397,287
NTIC’s share of joint ventures’ undistributed earnings | 24,548,560 | 23,645,685
EXCOR [Member] |  |
Investments in joint ventures | 14,622,568 | 14,645,783
NTIC’s share of joint ventures’ undistributed earnings | 14,591,663 | 14,614,878
All Other [Member] |  |
Investments in joint ventures | 10,870,660 | 10,751,504
NTIC’s share of joint ventures’ undistributed earnings | 9,956,897 | 9,030,807
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] |  |
Current assets | 56,703,487 | 56,420,503
Total assets | 64,773,897 | 64,183,071
Current liabilities | 12,976,356 | 12,553,716
Non-current liabilities | 300,116 | 323,199
Joint ventures’ equity | 51,497,426 | 51,306,156
EXCOR [Member] |  |
Current assets | 26,050,938 | 26,234,664
Total assets | 31,700,918 | 31,513,288
Current liabilities | 2,455,785 | 2,221,726
Non-current liabilities | 0 | 0
Joint ventures’ equity | 29,245,133 | 29,291,562
Joint Ventures in France [Member] |  |
Current assets |  | 30,185,839
Total assets |  | 32,669,783
Current liabilities |  | 10,331,990
Non-current liabilities |  | 323,199
Joint ventures’ equity |  | $ 22,014,594
All Other [Member] |  |
Current assets | 30,652,549 |
Total assets | 33,072,979 |
Current liabilities | 10,520,571 |
Non-current liabilities | 300,116 |
Joint ventures’ equity | $ 22,252,293 |

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