Leases - Schedule of Financial Statement Classification of Lease Balances With Consolidated Balance Sheet (Parenthetical) (Detail) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Property and equipment [Member]
Lessee Lease Description [Line Items]
Finance lease assets, accumulated amortization	$ 1,185,000	$ 861,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration