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Treasury Stock - Additional Information (Details) - USD ($) | 1 Months Ended | 6 Months Ended | 22 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Jun. 30, 2021 | Jun. 30, 2021
Equity Class Of Treasury Stock [Line Items] |  |  |  |
Stock repurchase, shares |  |  | 0 | 162,000
Common stock repurchase, value |  |  | $ 1,600,000 | $ 1,600,000
Common Stock | Share Repurchase Program September 9, 2019 |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |
Period of stock repurchase program |  | 12 months |  |
Additional period of stock repurchase program | 12 months |  |  |
Common Stock | Share Repurchase Program September 9, 2019 | Maximum |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |
Stock approved for repurchase, value |  | $ 7,000,000.0 |  |

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