Note 12 - Segment and Geographical Information - Total Net Sales by Geographic Distribution (Details) - USD ($)	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Net sales by segment	$ 39,569,123	$ 32,933,565
CHINA
Net sales by segment	7,225,659	4,114,288
BRAZIL
Net sales by segment	2,394,730	2,172,297
GERMANY
Net sales by segment	711,923
INDIA
Net sales by segment	1,417,955	1,104,947
Other Countries [Member]
Net sales by segment	6,031,162	5,237,553
UNITED STATES
Net sales by segment	$ 21,787,694	$ 20,304,480