Note 14 - Income Taxes - Reconciliations of the Expected Federal Income Tax at the Statutory Rate with the Provisions for Income Taxes (Details) - USD ($)	12 Months Ended
	Aug. 31, 2019	Aug. 31, 2018
Tax computed at statutory rates	$ 1,398,000	$ 2,081,000
State income tax, net of federal benefit	27,000	25,000
Tax effect on equity in income of international joint ventures	(1,490,000)	(1,903,000)
Tax effect of foreign operations	672,000	101,000
Deemed repatriation	204,000	4,011,000
Foreign tax credit		(3,783,000)
Research and development credit	(133,000)	(10,000)
Valuation allowance	133,000	(173,000)
Stock based compensation	208,000	57,000
Non-controlling interest	(74,000)	(103,000)
Deferred rate change		633,000
Other	(103,000)	(60,000)
Total income tax expense	$ 841,837	$ 876,103