Management's Plans Regarding Liquidity and Capital Resources - Additional Information (Detail)	12 Months Ended
Dec. 31, 2019
Affiliated Entity [Member]
Liquidity And Managements Plans [Line Items]
Percentage of fund owed by Shareholders	100.00%

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

No definition available.

Name:	us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration