Subsequent Events - Additional Information (Detail) - Senior Secured Notes [Member] - Subsequent Event [Member] $ in Millions	1 Months Ended
Oct. 31, 2020 USD ($)
Subsequent Event [Line Items]
Aggregate principal amount repurchased	$ 30
Repurchase price paid as a percentage of notional value of the notes	100.40%

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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