Carrying Value of Goodwill and Change in Balance (Detail) $ in Thousands	3 Months Ended
Jun. 30, 2020 USD ($)
Goodwill [Line Items]
Beginning balance	$ 31,969
Foreign currency translation impact	665
Ending balance	76,783
Breethe, Inc
Goodwill [Line Items]
Breethe, Inc. acquisition	$ 44,149

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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-Subparagraph (SX 210.9-03(10)(1))
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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