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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