Cash Equivalents, Marketable Securities and Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended
	Aug. 01, 2018	Jul. 31, 2014	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate carrying amount of portfolio of other investments			$ 13,800		$ 12,600
Investments in private medical device company			$ 1,166	$ 400
Subsequent Event
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in private medical device company	$ 5,800
ECP Entwicklungsgesellschaft mbH
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payments to acquire businesses, cash paid		$ 13,000
Potential payouts payments		$ 15,000