Fair Value Measurements - Additional Information (Detail) - CRG Servicing LLC [Member] - Senior Secured Term Loan [Member] - USD ($) $ in Millions	Jun. 30, 2020	Feb. 13, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Carrying value of loan	$ 51.2
long-term debt	48.2
Exit fee accrued		$ 3.0
Fair value of loan	51.0
Other Long-term Liabilities [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Exit fee accrued	$ 3.0

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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