Note 11 - Segment and Geographic Information - Total Long-lived Assets by Geographic Distribution (Details) - USD ($)	Nov. 30, 2018	Aug. 31, 2018
Total long-lived assets	$ 7,059,236	$ 7,168,826
CHINA
Total long-lived assets	188,695	205,490
BRAZIL
Total long-lived assets	76,977	71,677
GERMANY
Total long-lived assets	6,142	7,058
INDIA
Total long-lived assets	31,101	22,220
UNITED STATES
Total long-lived assets	$ 6,756,321	$ 6,862,381