Acquisitions Narrative (Detail) - USD ($) $ in Thousands				3 Months Ended			9 Months Ended
	Feb. 03, 2015	Oct. 01, 2014	Apr. 30, 2014	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Business Acquisition [Line Items]
Acquisition, net of cash acquired							$ 17,257	$ 37,832
Goodwill, Period Increase (Decrease)							8,800
Amortization of acquired intangible assets				$ 1,917		$ 1,606	5,743	$ 4,522
FluidX [Member]
Business Acquisition [Line Items]
Acquisition, net of cash acquired		$ 15,505
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Equity Interests	$ 100
Escrow Reserve				1,600			1,600
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual				3,800			11,200
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual				(300)			(500)
Inventory Step Up				0			1,000
Amortization of acquired intangible assets				300			1,000
FluidX [Member] | Completed Technology
Business Acquisition [Line Items]
Useful life of intangible assets acquired		7 years
FluidX [Member] | Trademarks [Member]
Business Acquisition [Line Items]
Useful life of intangible assets acquired		7 years
FluidX [Member] | Customer Relationships
Business Acquisition [Line Items]
Useful life of intangible assets acquired		7 years
Dynamic Micro Systems
Business Acquisition [Line Items]
Acquisition, net of cash acquired			$ 31,625
Escrow Reserve				2,800			2,800
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual				11,000			27,100
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual				700			500
Goodwill, Period Increase (Decrease)				300	$ 300
Inventory Step Up				0			600
Amortization of acquired intangible assets				$ 600			$ 1,700
Escrow Refund, Equity issued in Business Combination, Fair Value Adjustment					$ 2,200
Dynamic Micro Systems | Completed Technology
Business Acquisition [Line Items]
Useful life of intangible assets acquired			5 years
Dynamic Micro Systems | Customer Relationships
Business Acquisition [Line Items]
Useful life of intangible assets acquired			8 years