Balance Sheet Components - Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
May 31, 2017	Aug. 31, 2016
Intangible Assets
Gross Carrying Amount	$ 1,037	$ 966
Accumulated Amortization	974	922
Total	$ 63	$ 44
Patents and trademarks
Intangible Assets
Weighted Average Amortization Period (Years)	15 years	15 years
Gross Carrying Amount	$ 532	$ 487
Accumulated Amortization	469	443
Total	$ 63	$ 44
Acquired technology
Intangible Assets
Weighted Average Amortization Period (Years)	5 years	5 years
Gross Carrying Amount	$ 505	$ 479
Accumulated Amortization	$ 505	$ 479

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- Definition

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.

+ References

No definition available.

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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