Components of Accounts Receivable (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Receivables [Abstract]
Trade receivables	$ 85,852	$ 91,849
Allowance for doubtful accounts	(1,202)	(1,040)	$ (320)	$ (282)
Accounts receivable, net	$ 84,650	$ 90,809

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant