Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended
	Jun. 30, 2020	Feb. 29, 2020	Jun. 30, 2020	Mar. 31, 2020
Stockholders Equity Disclosure [Line Items]
Net proceeds from sale of common stock after deducting underwriting commissions and offering expenses payable	$ 28.0	$ 32.0
Underwriting discounts, commissions and offering expenses payable	$ 2.0	$ 2.5
Common Stock
Stockholders Equity Disclosure [Line Items]
Firm commitment underwritten public offering shares	4,615,384	5,307,692
Issuance of stock, shares			4,615,384	5,307,692
Common stock price, per share	$ 6.50	$ 6.50	$ 6.50
Common Stock | Overallotment Option
Stockholders Equity Disclosure [Line Items]
Issuance of stock, shares		692,307