Net Loss per Share - Additional Information (Detail) - $ / shares		3 Months Ended
	Mar. 13, 2019	Mar. 31, 2020	Mar. 31, 2019	Nov. 29, 2019	Apr. 16, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted average common shares outstanding—basic and diluted (in shares)		20,014,000	1,718,000
Pre Funded Warrant
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted average common shares outstanding—basic and diluted (in shares)		3,880,000
Exercise Price (usd per share)				$ 11.999	$ 10.999
Pre Funded Warrant | Maximum
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Exercise Price (usd per share)		$ 0.01
Redeemable Common Stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted average common shares outstanding—basic and diluted (in shares)	107,371