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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 |

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