Note 11 - Segment and Geographic Information - Total Long-lived Assets by Geographic Distribution (Details) - USD ($)	Aug. 31, 2018	Aug. 31, 2017
Total long-lived assets	$ 7,168,826	$ 7,359,662
CHINA
Total long-lived assets	205,490	228,458
BRAZIL
Total long-lived assets	71,677	54,646
GERMANY
Total long-lived assets	7,058	14,171
INDIA
Total long-lived assets	22,220	14,712
UNITED STATES
Total long-lived assets	$ 6,862,381	$ 7,047,675