Subsequent Events - Additional Information (Detail)			12 Months Ended
	Mar. 12, 2021	Mar. 11, 2021	Dec. 31, 2020
Notes Payable to Banks with Maturity of September 1, 2021 [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Maturity date		Sep. 01, 2021
Notes Payable to Banks with Maturity of April 15, 2021 [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Maturity date	Apr. 15, 2021
Notes Payable to Banks with Maturity of February 1, 2021 [Member]
Subsequent Event [Line Items]
Maturity date			Feb. 01, 2021
Notes Payable to Banks with Maturity of February 9, 2021 [Member]
Subsequent Event [Line Items]
Maturity date			Feb. 09, 2021