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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
-URI http://asc.fasb.org/extlink&oid=6506951

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3044-108585

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) $ in Thousands	3 Months Ended
	Nov. 30, 2016 USD ($) customer	Nov. 30, 2015 USD ($)	Aug. 31, 2016 USD ($)	Aug. 31, 2015 USD ($)
Concentration of Credit Risk
Cash and cash equivalents	$ 4,827	$ 3,469	$ 6,030	$ 4,808
Number of Customers \| customer	10
Net revenues \| Customer concentration
Concentration of Credit Risk
Concentration risk (as a percent)	67.00%	67.00%
Net revenues \| Geographic concentration
Concentration of Credit Risk
Concentration risk (as a percent)	76.00%	76.00%
United States \| U.S. Dollars
Concentration of Credit Risk
Cash and cash equivalents	$ 673		945
Taiwan \| U.S. Dollars
Concentration of Credit Risk
Cash and cash equivalents	2,813		3,580
Taiwan \| New Taiwan Dollars
Concentration of Credit Risk
Cash and cash equivalents	528		738
Taiwan \| Other currencies
Concentration of Credit Risk
Cash and cash equivalents	472		481
China (including Hong Kong) \| U.S. Dollars
Concentration of Credit Risk
Cash and cash equivalents	7		8
China (including Hong Kong) \| Renminbi
Concentration of Credit Risk
Cash and cash equivalents	$ 334		277
China (including Hong Kong) \| H.K. dollars
Concentration of Credit Risk
Cash and cash equivalents			$ 1