Note 13 - Segment and Geographic Information - Total Net Sales by Geographic Distribution (Details) - USD ($)	3 Months Ended		9 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021
Net sales	$ 18,964,921	$ 15,418,524	$ 53,906,973	$ 40,980,518
CHINA
Net sales	3,624,396	4,037,493	11,845,989	13,025,127
BRAZIL
Net sales	1,554,364	1,237,586	3,786,670	2,756,008
INDIA
Net sales	4,824,004	1,540,734	13,369,769	4,036,208
Other Countries [Member]
Net sales	2,077,431	1,884,825	6,747,535	4,964,803
UNITED STATES
Net sales	$ 6,884,726	$ 6,717,886	$ 18,157,010	$ 16,198,372