Note 11 - Segment and Geographic Information - Total Net Sales by Geographic Distribution (Details) - USD ($)	3 Months Ended		6 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022
Net sales	$ 18,270,825	$ 16,748,639	$ 38,223,591	$ 34,942,052
CHINA
Net sales	2,871,795	4,163,741	6,618,435	8,221,593
BRAZIL
Net sales	1,206,790	936,089	2,574,208	2,232,306
INDIA
Net sales	4,364,358	4,068,781	9,211,285	8,545,765
Other Countries [Member]
Net sales	3,076,885	2,464,066	5,590,505	4,670,103
UNITED STATES
Net sales	$ 6,750,997	$ 5,115,962	$ 14,229,158	$ 11,272,285