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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Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Aug. 31, 2016	May 31, 2016	Feb. 29, 2016	Nov. 30, 2015	Aug. 31, 2015	May 31, 2015	Feb. 28, 2015	Nov. 30, 2014	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2014
Concentration of Credit Risk
Cash and cash equivalents	$ 6,030				$ 4,808				$ 6,030	$ 4,808	$ 12,649
Revenues, net	1,883	$ 2,378	$ 2,916	$ 2,963	3,122	$ 3,508	$ 4,566	$ 2,928	$ 10,140	$ 14,124
Revenues \| Customer concentration \| Customer A
Concentration of Credit Risk
Concentration risk (as a percent)									23.00%	21.00%
Revenues, net									$ 2,334	$ 2,923
Revenues \| Customer concentration \| Customer B
Concentration of Credit Risk
Concentration risk (as a percent)									11.00%	5.00%
Revenues, net									$ 1,100	$ 749
Revenues \| Customer concentration \| Customer C
Concentration of Credit Risk
Concentration risk (as a percent)										11.00%
Revenues, net										$ 1,544
Accounts receivable \| Customer concentration \| Customer A
Concentration of Credit Risk
Concentration risk (as a percent)									37.00%	35.00%
Accounts receivable \| Customer concentration \| Customer B
Concentration of Credit Risk
Concentration risk (as a percent)									24.00%	9.00%
United States
Concentration of Credit Risk
Revenues, net									$ 4,157	$ 5,420
United States \| U.S. Dollars
Concentration of Credit Risk
Cash and cash equivalents	945				887				945	887
Taiwan
Concentration of Credit Risk
Revenues, net									1,190	3,131
Taiwan \| U.S. Dollars
Concentration of Credit Risk
Cash and cash equivalents	3,580				1,716				3,580	1,716
Taiwan \| New Taiwan Dollars
Concentration of Credit Risk
Cash and cash equivalents	738				1,067				738	1,067
Taiwan \| Other currencies
Concentration of Credit Risk
Cash and cash equivalents	481				344				481	344
China (including Hong Kong) \| U.S. Dollars
Concentration of Credit Risk
Cash and cash equivalents	8				262				8	262
China (including Hong Kong) \| Renminbi
Concentration of Credit Risk
Cash and cash equivalents	277				531				277	531
China (including Hong Kong) \| H.K. dollars
Concentration of Credit Risk
Cash and cash equivalents	$ 1				$ 1				$ 1	$ 1