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Note 6 - Investments in Joint Ventures - Condensed Balance Sheet of EXCOR and All Other Joint Ventures (Details) - USD ($) | Aug. 31, 2024 | Aug. 31, 2023
--- | --- | ---
Current assets | $ 41,579,219 | $ 39,671,556
Total assets | 94,676,502 | 89,344,303
Current liabilities | 17,896,943 | 16,721,372
Noncurrent liabilities | 1,604,238 | 1,924,134
Joint ventures’ equity | 71,193,991 | 66,356,273
Investments in joint ventures | 25,397,287 | 23,705,714
EXCOR and All Other Joint Ventures [Member] |  |
Investments in joint ventures | 25,397,287 | 23,705,714
NTIC’s share of joint ventures’ undistributed earnings | 23,645,685 | 20,493,861
EXCOR [Member] |  |
Investments in joint ventures | 14,645,783 | 13,683,608
NTIC’s share of joint ventures’ undistributed earnings | 14,614,878 | 12,075,524
All Other [Member] |  |
Investments in joint ventures | 10,751,504 | 10,022,106
NTIC’s share of joint ventures’ undistributed earnings | 9,030,807 | 8,418,337
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] |  |
Current assets | 56,420,503 | 55,339,662
Total assets | 64,183,071 | 59,729,348
Current liabilities | 12,553,716 | 11,464,247
Noncurrent liabilities | 323,199 | 323,762
Joint ventures’ equity | 51,306,156 | 47,941,339
EXCOR [Member] |  |
Current assets | 26,234,664 | 27,862,458
Total assets | 31,513,288 | 30,054,277
Current liabilities | 2,221,726 | 2,687,064
Noncurrent liabilities | 0 | 0
Joint ventures’ equity | 29,291,562 | 27,367,213
All Other [Member] |  |
Current assets | 30,185,839 | 27,477,204
Total assets | 32,669,783 | 29,675,071
Current liabilities | 10,331,990 | 8,777,183
Noncurrent liabilities | 323,199 | 323,762
Joint ventures’ equity | $ 22,014,594 | $ 20,574,126

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