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Note 12 - Segment and Geographical Information - Total Net Sales by Geographic Distribution (Details) - USD ($)
3 Months Ended 6 Months Ended
Feb. 28, 2017
Feb. 29, 2016
Feb. 28, 2017
Feb. 29, 2016
Net sales by segment $ 8,742,903 $ 7,704,934 $ 18,444,926 $ 14,729,371
BRAZIL        
Net sales by segment     1,118,166 997,636
INDIA        
Net sales by segment     733,581 549,402
GERMANY        
Net sales by segment     217,496
CHINA        
Net sales by segment     3,296,299 1,439,754
UNITED STATES        
Net sales by segment     $ 13,079,384 $ 11,742,579