Distributions - Additional Information (Detail) - USD ($)					1 Months Ended	11 Months Ended	12 Months Ended
	Apr. 29, 2020	Mar. 30, 2020	Feb. 27, 2020	Mar. 07, 2018	Jan. 31, 2020	Dec. 31, 2018	Dec. 31, 2019
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Investment Company, Expense Offset Arrangement						$ 389,774	$ 1,372,020
Distribution Date 1 | Class FA
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)				$ 0.020604			$ 0.104167
Distribution Date 1 | Class A
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)				0.020604			0.104167
Distribution Date 1 | Class T
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)				0.016484			0.083333
Distribution Date 1 | Class D
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)				0.018544			0.09375
Distribution Date 1 | Class I
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)				$ 0.020604			$ 0.104167
Net Investment Income
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Investment Company, Expense Offset Arrangement						$ 389,774	$ 1,372,020
Subsequent Event [Member] | Class FA
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)	$ 0.104167	$ 0.104167	$ 0.104167
Subsequent Event [Member] | Class A
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)	0.104167	0.104167	0.104167
Subsequent Event [Member] | Class T
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)	0.083333	0.083333	0.083333
Subsequent Event [Member] | Class D
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)	0.093750	0.09375	0.09375
Subsequent Event [Member] | Class I
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)	$ 0.014167	$ 0.104167	$ 0.104167
Subsequent Event [Member] | Distribution Date 1 | Class FA
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)					$ 0.104167
Subsequent Event [Member] | Distribution Date 1 | Class A
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)					0.104167
Subsequent Event [Member] | Distribution Date 1 | Class T
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)					0.083333
Subsequent Event [Member] | Distribution Date 1 | Class D
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)					0.09375
Subsequent Event [Member] | Distribution Date 1 | Class I
Distribution Made to Limited Liability Company (LLC) Member [Line Items]
Declared distribution (in dollars per share)					$ 0.104167