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Note 6 - Investments in Joint Ventures - Condensed Balance Sheet of EXCOR and All Other Joint Ventures (Details) - USD ($) | Nov. 30, 2020 | Aug. 31, 2020
--- | --- | ---
Current assets | $ 35,475,804 | $ 33,202,350
Total assets | 69,205,052 | 66,074,488
Current liabilities | 7,302,886 | 6,097,604
Noncurrent liabilities | 276,042 | 272,443
Joint ventures’ equity | 58,370,435 | 56,659,415
Investments in joint ventures | 24,961,205 | 24,090,826
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] |  |
Current assets | 61,457,250 | 55,825,418
Total assets | 65,569,012 | 60,295,587
Current liabilities | 14,569,061 | 11,002,867
Noncurrent liabilities | 331,743 | 365,274
Joint ventures’ equity | 50,668,208 | 48,927,446
Investments in joint ventures | 24,961,205 | 24,090,826
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings | 22,726,127 | 21,855,747
EXCOR [Member] |  |
Current assets | 28,660,652 | 25,742,619
Total assets | 31,051,037 | 28,449,772
Current liabilities | 2,997,769 | 2,424,565
Noncurrent liabilities | 0 | 0
Joint ventures’ equity | 28,053,268 | 26,025,207
Investments in joint ventures | 14,026,636 | 13,012,606
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings | 13,995,731 | 12,981,701
All Other [Member] |  |
Current assets | 32,796,598 | 30,082,799
Total assets | 34,517,975 | 31,845,815
Current liabilities | 11,571,292 | 8,578,302
Noncurrent liabilities | 331,743 | 365,274
Joint ventures’ equity | 22,614,940 | 22,902,239
Investments in joint ventures | 10,934,569 | 11,078,220
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings | $ 8,730,396 | $ 8,874,046

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