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Note 6 - Investments in Joint Ventures (Tables) | 9 Months Ended
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May 31, 2021
Notes Tables |
Condensed Balance Sheet [Table Text Block] |
|  | As of May 31, 2021 |
|  | Total |  |  | EXCOR |  |  | All Other |
Current assets |  | $ | 68,123,606 |  |  | $ | 30,658,702 |  |  | $ | 37,464,904 |
Total assets |  |  | 72,216,965 |  |  |  | 33,027,046 |  |  |  | 39,189,919 |
Current liabilities |  |  | 16,369,403 |  |  |  | 3,570,261 |  |  |  | 12,799,142 |
Noncurrent liabilities |  |  | 1,225,790 |  |  |  | — |  |  |  | 1,225,790 |
Joint ventures’ equity |  |  | 54,621,772 |  |  |  | 29,456,785 |  |  |  | 25,164,987 |
Northern Technologies International Corporation’s share of joint ventures’ equity |  |  | 26,937,857 |  |  |  | 14,728,395 |  |  |  | 12,209,462 |
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings |  |  | 24,702,778 |  |  |  | 14,697,490 |  |  |  | 10,005,288 |
|  | As of August 31, 2020 |
|  | Total |  |  | EXCOR |  |  | All Other |
Current assets |  | $ | 55,825,418 |  |  | $ | 25,742,619 |  |  | $ | 30,082,799 |
Total assets |  |  | 60,295,587 |  |  |  | 28,449,772 |  |  |  | 31,845,815 |
Current liabilities |  |  | 11,002,867 |  |  |  | 2,424,565 |  |  |  | 8,578,302 |
Noncurrent liabilities |  |  | 365,274 |  |  |  | — |  |  |  | 365,274 |
Joint ventures’ equity |  |  | 48,927,446 |  |  |  | 26,025,207 |  |  |  | 22,902,239 |
Northern Technologies International Corporation’s share of joint ventures’ equity |  |  | 24,090,826 |  |  |  | 13,012,606 |  |  |  | 11,078,220 |
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings |  |  | 21,855,747 |  |  |  | 12,981,701 |  |  |  | 8,874,046 |
Condensed Income Statement [Table Text Block] |
|  | Three Months Ended May 31, 2021 |
|  | Total |  |  | EXCOR |  |  | All Other |
Net sales |  | $ | 31,959,539 |  |  | $ | 12,103,263 |  |  | $ | 19,856,276 |
Gross profit |  |  | 14,280,775 |  |  |  | 6,863,786 |  |  |  | 7,416,989 |
Net income |  |  | 4,051,518 |  |  |  | 2,068,326 |  |  |  | 1,983,192 |
Northern Technologies International Corporation’s share of equity in income from joint ventures |  |  | 2,033,536 |  |  |  | 1,039,576 |  |  |  | 993,960 |
Northern Technologies International Corporation’s dividends received from joint ventures |  |  | 181,952 |  |  |  | — |  |  |  | 181,952 |
|  | Nine Months Ended May 31, 2021 |
|  | Total |  |  | EXCOR |  |  | All Other |
Net sales |  | $ | 87,795,284 |  |  | $ | 32,196,843 |  |  | $ | 55,598,441 |
Gross profit |  |  | 39,802,014 |  |  |  | 18,661,980 |  |  |  | 21,140,034 |
Net income |  |  | 11,540,949 |  |  |  | 6,351,721 |  |  |  | 5,189,228 |
Northern Technologies International Corporation’s share of equity in income from joint ventures |  |  | 5,779,260 |  |  |  | 3,182,691 |  |  |  | 2,596,569 |
Northern Technologies International Corporation’s dividends received from joint ventures |  |  | 3,505,455 |  |  |  | 1,809,900 |  |  |  | 1,695,555 |
|  | Three Months Ended May 31, 2020 |
|  | Total |  |  | EXCOR |  |  | All Other |
Net sales |  | $ | 18,782,233 |  |  | $ | 7,753,631 |  |  | $ | 11,028,602 |
Gross profit |  |  | 8,647,784 |  |  |  | 4,478,739 |  |  |  | 4,169,045 |
Net income |  |  | 1,610,524 |  |  |  | 1,071,899 |  |  |  | 538,625 |
Northern Technologies International Corporation’s share of equity in income from joint ventures |  |  | 811,787 |  |  |  | 536,540 |  |  |  | 275,247 |
Northern Technologies International Corporation’s dividends received from joint ventures |  |  | 89,227 |  |  |  | — |  |  |  | 89,227 |
|  | Nine Months Ended May 31, 2020 |
|  | Total |  |  | EXCOR |  |  | All Other |
Net sales |  | $ | 68,531,897 |  |  | $ | 26,102,046 |  |  | $ | 42,429,851 |
Gross profit |  |  | 31,107,491 |  |  |  | 15,066,309 |  |  |  | 16,041,182 |
Net income |  |  | 6,920,047 |  |  |  | 4,492,254 |  |  |  | 2,427,793 |
Northern Technologies International Corporation’s share of equity in income from joint ventures |  |  | 3,466,581 |  |  |  | 2,246,930 |  |  |  | 1,219,651 |
Northern Technologies International Corporation’s dividends received from joint ventures |  |  | 5,648,153 |  |  |  | 4,675,850 |  |  |  | 972,303 |

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