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Stockholders' Equity - Equity Financings - Additional Information (Detail) - USD ($) |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2020 | Nov. 30, 2021 | Feb. 28, 2021 | Aug. 31, 2020 | Feb. 29, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Jun. 23, 2020 | Jun. 22, 2020
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock, shares authorized | 300,000,000 |  |  |  |  | 300,000,000 | 300,000,000 | 300,000,000 |
Equity Financings [Member] |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock, shares authorized |  |  |  |  |  |  |  |  | 150,000,000
Equity Financings [Member] | Share Offering [Member] |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock issued |  | 5,122,273 | 10,465,000 |  | 1,500,000 |  |  |  |
Common stock, additional shares issued |  | 1,095,000 | 1,365,000 |  |  |  |  |  |
Pre-funded warrants issued to purchase common stock shares |  | 3,272,727 |  |  |  |  |  |  |
Price per share |  | $ 13.75 | $ 11.00 |  | $ 14.50 |  |  |  |
Pre-funded warrants issued, price per share |  | $ 13.74 |  |  |  |  |  |  |
Gross proceeds from issuance of common stock |  | $ 115,400,000 | $ 115,100,000 |  | $ 21,750,000 |  |  |  |
Share issuance costs |  | $ 7,200,000 | $ 7,200,000 |  | $ 1,800,000 |  |  |  |
Share Purchase Agreement [Member] |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock issued | 3,010,722 |  |  |  |  |  |  |  |
Price per share | $ 5.22 |  |  |  |  |  | $ 5.22 |  |
Gross proceeds from issuance of common stock | $ 15,700,000 |  |  |  |  |  |  |  |
Share issuance costs | $ 100,000 |  |  |  |  |  |  |  |
At-the-Market Offering [Member] |  |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock issued |  |  |  |  |  | 48,538 | 2,590,093 |  |
Price per share | $ 5.74 |  |  |  |  | $ 11.37 | $ 5.74 |  |
Gross proceeds from issuance of common stock |  |  |  |  |  | $ 552,000 | $ 14,900,000 |  |
Share issuance costs |  |  |  |  |  | $ 53,000 | $ 646,000 |  |
Stock issuances, sales agent commission maximum percentage |  |  |  | 3.00% |  |  |  |  |

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