Earnings (Loss) Per Share (Additional Information) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Feb. 29, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Shares of common stock excluded from the calculation of diluted net income per share because of antidilutive effect	6,700,000	8,000,000.0	6,900,000	7,600,000
Additional funding in exchange for preferred stock					$ 10.0	$ 0.8
Share of preferred stock in exchange for additional funding					8,064,516
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares of common stock excluded from the calculation of diluted net income per share because of antidilutive effect	6,700,000	8,000,000.0	6,900,000	7,600,000