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Note 13 - Segment and Geographic Information - Cost of Goods Sold by Segment (Details) - USD ($)
 12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
 [1]
Cost of goods sold $ 51,090,298 $ 36,920,814
Direct Cost of Goods Sold [Member] | ZERUST [Member]    
Cost of goods sold 34,673,146 26,028,555
Direct Cost of Goods Sold [Member] | NaturTec [Member]    
Cost of goods sold 12,859,343 7,717,429
Indirect Cost of Goods Sold [Member]    
Cost of goods sold $ 3,557,809 $ 3,174,830
[1] The percent of segment sales is calculated by dividing the direct cost of goods sold for each individual segment category by the net sales for each segment category.