Stockholders' Equity - Additional Information (Detail) - USD ($)		3 Months Ended	12 Months Ended
	Oct. 15, 2021	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Stockholders Equity Disclosure [Line Items]
Underwriting discounts, commissions and offering expenses payable		$ 3,600,000
Net proceeds from sale of common stock after deducting underwriting commissions and offering expenses		$ 49,300,000
Common stock warrants issued			31,409,707	22,097,820
Common stock warrants outstanding			31,409,707	22,097,820
Common stock, par value			$ 0.001	$ 0.001
2021 ATM Program
Stockholders Equity Disclosure [Line Items]
Common stock, par value	$ 0.001
Proceeds from Issuance	$ 50,000,000.0
Percentage of commission for shares sold	3.00%
Legal expenses incurred	$ 50,000
Common Stock
Stockholders Equity Disclosure [Line Items]
Issuance of common stock for public offering, net of issuance costs, shares		9,185,000	9,185,000	9,923,076
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, shares		485,000
Warrants
Stockholders Equity Disclosure [Line Items]
Common stock warrants issued			85	85
Common stock warrants outstanding			85	85
Warrants exercise price per share			$ 392.70	$ 392.70
Warrant expiration date			Aug. 31, 2022