Balance Sheet Details - Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2014	Aug. 31, 2014
Acquired Intangible Assets By Major Class [Line Items]
Carrying Amount	$ 8,055	$ 8,030
Accumulated Amortization	2,050	2,011
Trade Names/Brand Portfolio [Member]
Acquired Intangible Assets By Major Class [Line Items]
Carrying Amount	2,910	2,910
Accumulated Amortization	45	35
Patents and Other [Member]
Acquired Intangible Assets By Major Class [Line Items]
Carrying Amount	1,895	1,870
Accumulated Amortization	1,581	1,572
Customer Lists and Relationships [Member]
Acquired Intangible Assets By Major Class [Line Items]
Carrying Amount	3,060	3,060
Accumulated Amortization	353	296
Non-compete Agreement [Member]
Acquired Intangible Assets By Major Class [Line Items]
Carrying Amount	190	190
Accumulated Amortization	$ 71	$ 108