Equity Method Investments BioCision, LLC (Detail) - USD ($) $ in Thousands		2 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Nov. 28, 2016	Nov. 28, 2016	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Sep. 30, 2016
Schedule of Equity Method Investments [Line Items]
Equity method investments			$ 29,803		$ 29,803		$ 27,273
Equity in earnings of equity method investments			2,777	$ 710	4,719	$ 869
Non-cash consideration transferred					10,348	0
Gain on settlement of equity method investment			$ 0	0	1,847	0
Loss on settlement of financial instruments					231
BioCision, LLC
Schedule of Equity Method Investments [Line Items]
Joint venture interest, percentage							20.00%
Equity method investments	$ 1,200	$ 1,200					$ 1,700
Equity in earnings of equity method investments		(500)		$ (100)		(300)
Warrants aggregate fair value (less than)							$ 100
Recognized measurement gains						$ 300
Equity in earnings of equity method investments, adjustment		$ (200)
Convertible Debt Securities | BioCision, LLC
Schedule of Equity Method Investments [Line Items]
Investment maturity period							5 years
Convertible debt securities							$ 5,800
Permanent Term Loan, Tranche One | BioCision, LLC
Schedule of Equity Method Investments [Line Items]
Annual interest rate (percent)							10.00%
Permanent Term Loan, Tranche One | Other Assets | BioCision, LLC
Schedule of Equity Method Investments [Line Items]
Carrying value of bridge loans							$ 1,500
Loan receivable							$ 1,500
Other Income
Schedule of Equity Method Investments [Line Items]
Loss on settlement of financial instruments					200
Other Income | BioCision, LLC
Schedule of Equity Method Investments [Line Items]
Gain on settlement of equity method investment					$ 1,800
Cool Lab, LLC
Schedule of Equity Method Investments [Line Items]
Net carrying value of assets transferred	$ 900
Percentage of voting interests acquired (as a percent)	100.00%	100.00%
Total purchase price	$ 15,194
Payments to acquire businesses	4,800
Liabilities incurred	100
Non-cash consideration transferred	$ 10,300
Equity interest in acquiree, percentage (as a percent)	20.00%	20.00%
Equity method investments, fair value disclosure	$ 3,100
Convertible debt securities and warrants	5,600
Term notes, fair value disclosure	1,600
Carrying value of warrant (less than)	100	$ 100
Carrying value of bridge loans	1,600	1,600
Cool Lab, LLC | Convertible Debt Securities
Schedule of Equity Method Investments [Line Items]
Convertible debt securities	5,600	5,600
Significant Unobservable Inputs (Level 3) | Cool Lab, LLC
Schedule of Equity Method Investments [Line Items]
Stock warrant, fair value (less than $0.1 million)	100	100
Loans receivable, fair value disclosure	1,600	1,600
Convertible Debt Securities | Cool Lab, LLC
Schedule of Equity Method Investments [Line Items]
Carrying value of convertible debt securities	$ 5,800	$ 5,800