Organization - Additional Information (Detail) - USD ($)		12 Months Ended
Mar. 19, 2020	Dec. 31, 2019
Organization And Basis Of Presentation [Line Items]
Notes payable to affiliates		$ 5,700,000
Notes payable maturity		2020
CDS [Member] \| Subsequent Events [Member] \| Revolving Capital Line of Credit Agreement [Member]
Organization And Basis Of Presentation [Line Items]
Debt instrument, term	5 years
CDS [Member] \| Subsequent Events [Member] \| Revolving Capital Line of Credit Agreement [Member] \| Secured Financing [Member]
Organization And Basis Of Presentation [Line Items]
Capital line of credit	$ 10,000,000
Debt instrument, term	5 years
Master Transfer Agreement \| CDS [Member] \| Class A [Member]
Organization And Basis Of Presentation [Line Items]
Membership interests transferred in exchange for estimated residual cash flows period		3 years

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