Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Feb. 29, 2020
Stockholders Equity Disclosure [Line Items]
Net proceeds from sale of common stock after deducting underwriting commissions and offering expenses	$ 49.3
Underwriting discounts, commissions and offering expenses payable	$ 3.6
Common Stock
Stockholders Equity Disclosure [Line Items]
Issuance of common stock for public offering, net of issuance costs of $2,514 and $3,536, shares	9,185,000	4,615,384	5,307,692
Common stock price, per share				$ 5.75
Common Stock | Underwriters' Overallotment Option
Stockholders Equity Disclosure [Line Items]
Issuance of common stock for public offering, net of issuance costs of $2,514 and $3,536, shares	485,000