Business Combinations - Additional Information (Detail) $ in Thousands, € in Millions				3 Months Ended		6 Months Ended
	Jan. 08, 2016 USD ($)	Nov. 20, 2015 USD ($)	Nov. 20, 2015 EUR (€)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Nov. 20, 2015 EUR (€)
Business Acquisition [Line Items]
Acquisition transaction, integration and other costs				$ 640		$ 3,131
Business acquisition, revenue recognized				16,699	$ 14,415	33,240	$ 28,620
Business acquisition, net loss recognized				825	3,051	3,338	6,665
Creagh Medical Ltd [Member]
Business Acquisition [Line Items]
Outstanding common shares and voting shares percentage		100.00%						100.00%
Payments to acquire business						28,274
Upfront payments		$ 19,300	€ 18			18,417
Contingent milestone payments		12,800						€ 12
Payments for repurchase of securities						800
Repayments of assumed debt				800
Acquisition transaction, integration and other costs				2,400		2,600
Creagh Medical Ltd [Member] | Maximum [Member]
Business Acquisition [Line Items]
Payments to acquire business		$ 32,000	€ 30
NorMedix, Inc. [Member]
Business Acquisition [Line Items]
Outstanding common shares and voting shares percentage	100.00%
Payments to acquire business	$ 14,000					10,740
Upfront payments	7,000					7,000
Contingent milestone payments	$ 7,000
Acquisition transaction, integration and other costs				$ 300		300
Creagh Medical and NorMedix [Member]
Business Acquisition [Line Items]
Business acquisition, revenue recognized						1,600
Business acquisition, net loss recognized						(1,100)
Creagh Medical and NorMedix [Member] | Pro Forma [Member]
Business Acquisition [Line Items]
Amortization expense on intangible assets					600	400	1,300
Contingent consideration accretion expense					400	300	800
Non-recurring professional fees						2,900
Tax effect impact					$ 200	$ 300	$ 300