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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Summary Of Significant Accounting Policies [Line Items] |  |
Dividends, common stock, cash | $ 0 |
Accounting Standards Update No. 2019-12 [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Change In Accounting Principle Accounting Standards Update Adopted | true |
Change in Accounting Principle, Accounting Standards Update, Adoption Date | Jan. 01, 2021 |
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect | true |
ATM Sales Agreement [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Deferred offering costs | $ 162,000 | $ 284,000
Reduction in stockholders' equity | $ 508,000 | $ 105,000
Computer Equipment [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Property, Equipment and leasehold improvements, useful life | 3 years |
Furniture and Office Equipment [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Property, Equipment and leasehold improvements, useful life | 5 years |

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