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Related Party Transactions - Additional Information (Detail) - Consulting Services [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party One [Member]
Related Party Transaction [Line Items]
Rent and other expenses paid	$ 0.2	$ 0.2	$ 0.3
Related Party Two [Member]
Related Party Transaction [Line Items]
Rent and other expenses paid	$ 0.1	$ 0.1	$ 0.1

X

- Definition

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.

+ References

No definition available.

+ Details

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X

- Definition

Amount of selling, general and administrative expenses resulting from transactions, excluding transactions that are eliminated in consolidated or combined financial statements, with related party.

+ References

No definition available.

+ Details

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X

- Details

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Period Type:

X

- Details

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Namespace Prefix:
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Period Type:

X

- Details

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Namespace Prefix:
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