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Income Per Share - Additional Information (Detail) - Common Stock [Member] - shares		12 Months Ended
	Mar. 24, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares issued		4,059,000	3,097,200	2,500,000
Subsequent Event [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares issued	3,125,000
Over-Allotment Option [Member] | Subsequent Event [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Shares issued	468,750

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