Note 13 - Segment and Geographic Information - Total Net Sales by Geographic Distribution (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021
Net sales	$ 16,748,639	$ 12,782,882	$ 34,942,052	$ 25,561,994
CHINA
Net sales	4,163,741	4,443,656	8,221,593	8,987,634
BRAZIL
Net sales	936,089	804,569	2,232,306	1,518,422
INDIA
Net sales	4,068,781	1,295,006	8,545,765	2,495,474
Other Countries [Member]
Net sales	2,464,066	1,620,521	4,670,103	3,079,978
UNITED STATES
Net sales	$ 5,115,962	$ 4,619,130	$ 11,272,285	$ 9,480,486