Summary of Significant Accounting Policies - Summary of Amortizable Lives of Intangible Assets (Detail)	12 Months Ended
	Sep. 30, 2014
Patents | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortizable lives	7 years
Patents | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortizable lives	15 years
Completed technology | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortizable lives	5 years
Completed technology | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortizable lives	10 years
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortizable lives	5 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortizable lives	13 years