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Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 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 | 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 |

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