Income Taxes - Summary of Open Tax Years by Major Tax Jurisdiction (Details)	12 Months Ended
	Aug. 31, 2017
U.S. Federal | Earliest Tax Year
Income Tax Contingency [Line Items]
Open Tax Year	2005
U.S. Federal | Latest Tax Year
Income Tax Contingency [Line Items]
Open Tax Year	2016
U.S. State | Earliest Tax Year
Income Tax Contingency [Line Items]
Open Tax Year	2005
U.S. State | Latest Tax Year
Income Tax Contingency [Line Items]
Open Tax Year	2014
Foreign-Taiwan
Income Tax Contingency [Line Items]
Open Tax Year	2016