Goodwill and Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2016	Sep. 30, 2015
Indefinite Lived Intangible Assets By Major Class [Line Items]
Cost	$ 3,521
Accumulated Amortization	619
Net	$ 2,902	$ 3,397
Completed technologies [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Weighted Average Amortization Period	6 years
Cost	$ 2,337
Accumulated Amortization	406
Net	$ 1,931
Customer relationships [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Weighted Average Amortization Period	6 years
Cost	$ 957
Accumulated Amortization	166
Net	$ 791
Tradenames [Member]
Indefinite Lived Intangible Assets By Major Class [Line Items]
Weighted Average Amortization Period	5 years
Cost	$ 227
Accumulated Amortization	47
Net	$ 180