Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2016	Sep. 30, 2015
Indefinite Lived Intangible Assets By Major Class [Line Items]
Cost	$ 3,489
Accumulated Amortization	464
Net	$ 3,025	$ 3,397
Completed technologies [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Weighted Average Amortization Period	6 years
Cost	$ 2,316
Accumulated Amortization	304
Net	$ 2,012
Customer relationships [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Weighted Average Amortization Period	6 years
Cost	$ 948
Accumulated Amortization	125
Net	$ 823
Tradenames [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Weighted Average Amortization Period	5 years
Cost	$ 225
Accumulated Amortization	35
Net	$ 190