v3.26.1
Note 7 - Investments in Joint Ventures - Condensed Income Statement of EXCOR and All Other Joint Ventures (Details) - USD ($)
 3 Months Ended 6 Months Ended
Feb. 28, 2026
Feb. 28, 2025
Feb. 28, 2026
Feb. 28, 2025
Net sales $ 21,996,785 $ 19,072,066 $ 45,305,666 $ 40,410,459
Net sales 21,996,785 19,072,066 45,305,666 40,410,459
Gross profit 7,857,886 6,795,584 16,241,512 14,958,537
Gross profit 7,857,886 6,795,584 16,241,512 14,958,537
Net income (35,323) 434,319 202,496 995,410
Equity in income from joint ventures 1,100,670 620,730 2,322,786 1,750,323
Net income (35,323) 434,319 202,496 995,410
NTIC’s share of equity in income from joint ventures 1,100,670 620,730 2,322,786 1,750,323
EXCOR and All Other Joint Ventures [Member]        
Net income 2,216,229 1,219,970 4,660,463 3,479,157
Equity in income from joint ventures 1,100,670 620,730 2,322,786 1,750,323
Net income 2,216,229 1,219,970 4,660,463 3,479,157
NTIC’s dividends received from joint ventures 1,184,193 680,737 1,402,525 680,737
NTIC’s share of equity in income from joint ventures 1,100,670 620,730 2,322,786 1,750,323
NTIC’s dividends received from joint ventures 1,184,193 680,737 1,402,525 680,737
EXCOR [Member]        
Net income 910,462 520,787 1,946,732 1,768,287
Equity in income from joint ventures 452,219 268,251 970,355 892,001
Net income 910,462 520,787 1,946,732 1,768,287
NTIC’s dividends received from joint ventures 0 0 0  
NTIC’s share of equity in income from joint ventures 452,219 268,251 970,355 892,001
NTIC’s dividends received from joint ventures 0 0 0  
All Other [Member]        
Net income 455,437 699,183 975,582 1,710,870
Equity in income from joint ventures 225,796 352,479 485,869 858,322
Net income 455,437 699,183 975,582 1,710,870
NTIC’s dividends received from joint ventures 0 680,737 218,332 680,737
NTIC’s share of equity in income from joint ventures 225,796 352,479 485,869 858,322
NTIC’s dividends received from joint ventures 0 680,737 218,332 680,737
Acobal [Member]        
Net income 621,935   1,230,612  
Equity in income from joint ventures 309,283   613,621  
Net income 621,935   1,230,612  
NTIC’s dividends received from joint ventures 747,477   747,477  
NTIC’s share of equity in income from joint ventures 309,283   613,621  
NTIC’s dividends received from joint ventures 747,477   747,477  
Zerust OY [Member]        
Net income 228,395   507,537  
Equity in income from joint ventures 113,370   252,941  
Net income 228,395   507,537  
NTIC’s dividends received from joint ventures 436,716   436,716  
NTIC’s share of equity in income from joint ventures 113,370   252,941  
NTIC’s dividends received from joint ventures 436,716   436,716  
EXCOR and All Other Joint Ventures [Member]        
Net sales 23,483,578 19,799,875 48,015,009 43,636,885
Net sales 23,483,578 19,799,875 48,015,009 43,636,885
Gross profit 10,401,649 8,241,116 21,084,388 18,556,399
Gross profit 10,401,649 8,241,116 21,084,388 18,556,399
EXCOR [Member]        
Net sales 8,336,442 6,904,045 17,102,159 15,642,859
Net sales 8,336,442 6,904,045 17,102,159 15,642,859
Gross profit 4,565,626 3,598,163 9,138,346 8,355,849
Gross profit 4,565,626 3,598,163 9,138,346 8,355,849
Acobal [Member]        
Net sales 3,255,573   6,857,925  
Net sales 3,255,573   6,857,925  
Gross profit 1,311,235   2,711,994  
Gross profit 1,311,235   2,711,994  
All Other [Member]        
Net sales 10,561,406 12,895,830 21,324,653 27,994,026
Net sales 10,561,406 12,895,830 21,324,653 27,994,026
Gross profit 3,717,307 4,642,953 7,567,210 10,200,550
Gross profit 3,717,307 $ 4,642,953 7,567,210 $ 10,200,550
Zerust OY [Member]        
Net sales 1,330,157   2,730,272  
Net sales 1,330,157   2,730,272  
Gross profit 807,480   1,666,838  
Gross profit $ 807,480   $ 1,666,838