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Note 11 - Segment and Geographic Information - Total Net Sales by Geographic Distribution (Details) - USD ($)
 3 Months Ended 9 Months Ended
May 31, 2023
May 31, 2022
May 31, 2023
May 31, 2022
Aug. 31, 2022
Total property and equipment, net $ 13,810,930   $ 13,810,930   $ 12,170,493
Net sales 20,969,726 $ 18,964,921 59,193,317 $ 53,906,973  
CHINA          
Total property and equipment, net 5,805,738   5,805,738   5,826,898
Net sales 3,318,373 3,624,396 9,936,808 11,845,989  
Other Countries [Member]          
Total property and equipment, net 770,863   770,863   565,022
Net sales 3,287,600 2,077,431 8,878,105 6,747,535  
BRAZIL          
Net sales 1,488,510 1,554,364 4,062,718 3,786,670  
UNITED STATES          
Total property and equipment, net 7,234,329   7,234,329   $ 5,778,573
Net sales 7,729,820 6,884,726 21,958,978 18,157,010  
INDIA          
Net sales $ 5,145,423 $ 4,824,004 $ 14,356,708 $ 13,369,769