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Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended				3 Months Ended		6 Months Ended																3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Feb. 28, 2014	Aug. 31, 2013	Feb. 28, 2013	Aug. 31, 2012	Feb. 28, 2014 Revenues Customer concentration risk Top ten customers	Feb. 28, 2013 Revenues Customer concentration risk Top ten customers	Feb. 28, 2014 Revenues Customer concentration risk Top ten customers	Feb. 28, 2013 Revenues Customer concentration risk Top ten customers	Feb. 28, 2014 United States U.S. Dollars	Aug. 31, 2013 United States U.S. Dollars	Feb. 28, 2014 Taiwan U.S. Dollars	Aug. 31, 2013 Taiwan U.S. Dollars	Feb. 28, 2014 Taiwan New Taiwan Dollars	Aug. 31, 2013 Taiwan New Taiwan Dollars	Feb. 28, 2014 Taiwan Other currencies	Aug. 31, 2013 Taiwan Other currencies	Feb. 28, 2014 China (including Hong Kong) U.S. Dollars	Aug. 31, 2013 China (including Hong Kong) U.S. Dollars	Feb. 28, 2014 China (including Hong Kong) Renminbi	Aug. 31, 2013 China (including Hong Kong) Renminbi	Feb. 28, 2014 China (including Hong Kong) H.K. dollars	Aug. 31, 2013 China (including Hong Kong) H.K. dollars	Feb. 28, 2014 Russia Revenues Customer concentration risk	Feb. 28, 2013 Russia Revenues Customer concentration risk	Feb. 28, 2014 Russia Revenues Customer concentration risk	Feb. 28, 2013 Russia Revenues Customer concentration risk	Feb. 28, 2014 Taiwan, the United States and China Revenues Customer concentration risk	Feb. 28, 2013 Taiwan, the United States and China Revenues Customer concentration risk	Feb. 28, 2014 Taiwan, the United States and China Revenues Customer concentration risk	Feb. 28, 2013 Taiwan, the United States and China Revenues Customer concentration risk
Summary of Significant Accounting Policies
Period over which significant loss is incurred preceding current fiscal year	3 years
Concentration of Credit Risk
Total cash and cash equivalents	$ 21,511	$ 36,272	$ 43,886	$ 47,228					$ 7,977	$ 18,631	$ 11,930	$ 16,158	$ 851	$ 445	$ 218	$ 264	$ 262	$ 345	$ 272	$ 428	$ 1	$ 1
Concentration risk (as a percent)					60.00%	46.00%	49.00%	39.00%															2.00%	11.00%	2.00%	11.00%	40.00%	52.00%	49.00%	51.00%

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- Definition

Represents the period over which significant loss is incurred preceding the current fiscal year.

+ References

No definition available.

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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.

+ References

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

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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-Article 5



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-Name Accounting Standards Codification

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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