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Treasury Stock - Additional Information (Details) - USD ($) $ in Millions |  |  |  | 1 Months Ended | 19 Months Ended
--- | --- | --- | --- | --- | ---
Sep. 09, 2020 | Sep. 09, 2019 | Aug. 07, 2018 | Aug. 31, 2017 | Mar. 31, 2021
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |
Stock repurchase, shares |  |  |  |  | 162,000
Common stock repurchase, value |  |  |  |  | $ 1.6
Common Stock | Share Repurchase Program August 2017 |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |
Stock approved for repurchase, value |  |  |  | $ 7.0 |
Period of stock repurchase program |  |  |  | 12 months |
Additional period of stock repurchase program |  |  | 12 months |  |
Common Stock | Share Repurchase Program September 9, 2019 |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |
Stock approved for repurchase, value |  | $ 7.0 |  |  |
Period of stock repurchase program |  | 12 months |  |  |
Additional period of stock repurchase program | 12 months |  |  |  |

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