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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jan. 31, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Non-cash equity compensation |  | $ 170 |  | $ 70 | $ 337 | $ 149
Restricted stock awards outstanding |  | 117,338 |  |  | 117,338 |
Unrecognized compensation expense |  |  |  |  | $ 1,100 |
Share-based compensation arrangement by share-based payment award, converted options to purchase common stock | 198,362 |  |  |  |  |
Share-based compensation arrangement by share-based payment award options to acquire common stock | 99,176 |  |  |  |  |
Options to acquire shares of common stock on post stock split basis | 148,764 |  |  |  |  |
Estimated fair value | $ 472 |  |  |  |  |
Stock option exercises, Shares |  | 15,866 | 67,031 |  |  |
Stock options outstanding |  | 43,732 |  |  | 43,732 |
Bay Banks [Member] |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Options to acquire shares of common stock on post stock split basis | 148,764 |  |  |  |  |
Weighted-average exercise price per stock option | $ 14.83 |  |  |  |  |
Remaining contractual life (in years) | 5 years 5 months 19 days |  |  |  |  |
Post Stock Split basis [Member] | Bay Banks [Member] |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Weighted-average exercise price per stock option | $ 9.89 |  |  |  |  |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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