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Note 6 - Investments in Joint Ventures - Condensed Balance Sheet of EXCOR and All Other Joint Ventures (Details) - USD ($) | May 31, 2021 | Aug. 31, 2020
--- | --- | ---
Current assets | $ 37,228,408 | $ 33,202,350
Total assets | 72,800,175 | 66,074,488
Current liabilities | 7,552,895 | 6,097,604
Noncurrent liabilities | 373,166 | 272,443
Joint ventures’ equity | 61,374,537 | 56,659,415
Investments in joint ventures | 26,937,857 | 24,090,826
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] |  |
Current assets | 68,123,606 | 55,825,418
Total assets | 72,216,965 | 60,295,587
Current liabilities | 16,369,403 | 11,002,867
Noncurrent liabilities | 1,225,790 | 365,274
Joint ventures’ equity | 54,621,772 | 48,927,446
Investments in joint ventures | 26,937,857 | 24,090,826
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings | 24,702,778 | 21,855,747
EXCOR [Member] |  |
Current assets | 30,658,702 | 25,742,619
Total assets | 33,027,046 | 28,449,772
Current liabilities | 3,570,261 | 2,424,565
Noncurrent liabilities | 0 | 0
Joint ventures’ equity | 29,456,785 | 26,025,207
Investments in joint ventures | 14,728,395 | 13,012,606
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings | 14,697,490 | 12,981,701
All Other [Member] |  |
Current assets | 37,464,904 | 30,082,799
Total assets | 39,189,919 | 31,845,815
Current liabilities | 12,799,142 | 8,578,302
Noncurrent liabilities | 1,225,790 | 365,274
Joint ventures’ equity | 25,164,987 | 22,902,239
Investments in joint ventures | 12,209,462 | 11,078,220
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings | $ 10,005,288 | $ 8,874,046

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