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Note 6 - Investments in Joint Ventures (Tables) | 9 Months Ended
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May 31, 2020
Notes Tables |
Condensed Balance Sheet [Table Text Block] |
|  | As of May 31, 2020
|  | Total |  | EXCOR |  | All Other
Current assets |  | $ | 52,424,780 |  |  | $ | 23,825,008 |  |  | $ | 28,599,772 |
Total assets |  |  | 56,403,406 |  |  |  | 26,143,537 |  |  |  | 30,259,869 |
Current liabilities |  |  | 11,741,077 |  |  |  | 2,686,694 |  |  |  | 9,054,383 |
Noncurrent liabilities |  |  | 32,412 |  |  |  | - |  |  |  | 32,412 |
Joint ventures’ equity |  |  | 44,629,920 |  |  |  | 23,456,842 |  |  |  | 21,173,078 |
Northern Technologies International Corporation’s share of joint ventures’ equity |  |  | 21,942,063 |  |  |  | 11,728,423 |  |  |  | 10,213,640 |
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings |  |  | 19,706,983 |  |  |  | 11,697,518 |  |  |  | 8,009,465 |
|  | As of August 31, 2019
|  | Total |  | EXCOR |  | All Other
Current assets |  | $ | 59,162,834 |  |  | $ | 29,139,787 |  |  | $ | 30,023,047 |
Total assets |  |  | 63,326,703 |  |  |  | 31,666,841 |  |  |  | 31,659,862 |
Current liabilities |  |  | 14,145,499 |  |  |  | 3,573,160 |  |  |  | 10,572,339 |
Noncurrent liabilities |  |  | 20,797 |  |  |  | — |  |  |  | 20,797 |
Joint ventures’ equity |  |  | 49,160,407 |  |  |  | 28,093,681 |  |  |  | 21,066,726 |
Northern Technologies International Corporation’s share of joint ventures’ equity |  |  | 24,207,339 |  |  |  | 14,046,842 |  |  |  | 10,160,497 |
Northern Technologies International Corporation’s share of joint ventures’ undistributed earnings |  |  | 22,178,126 |  |  |  | 14,015,937 |  |  |  | 8,162,189 |
Condensed Income Statement [Table Text Block] |
|  | 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 |
|  | Three Months Ended May 31, 2019
|  | Total |  | EXCOR |  | All Other
Net sales |  | $ | 27,774,112 |  |  | $ | 10,933,386 |  |  | $ | 16,840,726 |
Gross profit |  |  | 12,557,580 |  |  |  | 6,129,046 |  |  |  | 6,428,534 |
Net income |  |  | 3,797,785 |  |  |  | 2,707,342 |  |  |  | 1,090,443 |
Northern Technologies International Corporation’s share of equity in income from joint ventures |  |  | 1,877,410 |  |  |  | 1,353,856 |  |  |  | 523,554 |
Northern Technologies International Corporation’s dividends received from joint ventures |  | $ | 1,795,542 |  |  | $ | 1,673,700 |  |  | $ | 121,842 |
|  | Nine Months Ended May 31, 2019
|  | Total |  | EXCOR |  | All Other
Net sales |  | $ | 86,003,918 |  |  | $ | 34,895,042 |  |  | $ | 51,108,876 |
Gross profit |  |  | 38,547,018 |  |  |  | 19,118,704 |  |  |  | 19,428,314 |
Net income |  |  | 11,412,552 |  |  |  | 8,187,467 |  |  |  | 3,225,085 |
Northern Technologies International Corporation’s share of equity in income from joint ventures |  |  | 5,596,788 |  |  |  | 4,094,763 |  |  |  | 1,502,025 |
Northern Technologies International Corporation’s dividends received from joint ventures |  | $ | 3,822,785 |  |  | $ | 2,517,450 |  |  | $ | 1,305,335 |

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