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Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Aug. 31, 2020
Concentration Risk [Line Items]
Cash and cash equivalents	$ 2,693	$ 688	$ 2,832
Net revenues | Customer concentration
Concentration Risk [Line Items]
Concentration risk (as a percent)	85.00%	85.00%
Net revenues | Geographic concentration
Concentration Risk [Line Items]
Concentration risk (as a percent)	75.00%	89.00%
United States | U.S. Dollars
Concentration Risk [Line Items]
Cash and cash equivalents	$ 179		251
Taiwan | U.S. Dollars
Concentration Risk [Line Items]
Cash and cash equivalents	2,424		2,514
Taiwan | New Taiwan Dollars
Concentration Risk [Line Items]
Cash and cash equivalents	35		52
Taiwan | Other currencies
Concentration Risk [Line Items]
Cash and cash equivalents	$ 55		$ 15

X

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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