Schedule of Components of Contingent Consideration Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Mar. 31, 2020
Contingent consideration liabilities	$ 24,417	$ 9,000
ECP
Contingent consideration liabilities	10,117	$ 9,000
Breethe, Inc
Contingent consideration liabilities	$ 14,300

Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled beyond one year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 35
-Paragraph 1
-Subparagraph b
-URI http://asc.fasb.org/extlink&oid=116859824&loc=d3e6819-128478

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant