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Capital Stock - Additional Information (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | May 31, 2019
Class Of Stock [Line Items] |  |  |
Common stock, shares authorized | 500,000,000 | 500,000,000 |
Common stock, par value | $ 0.005 | $ 0.005 |
Common stock, shares issued | 11,703,430 | 11,538,998 |
Common stock, shares outstanding | 11,703,430 | 11,538,998 |
Common stock, voting rights | Holders of common stock have voting rights equal to one vote per share of common stock held |  |
Preferred stock, shares authorized | 20,000,000 | 20,000,000 |
Preferred stock, par value | $ 0.005 | $ 0.005 |
Preferred stock, shares issued | 0 | 0 |
Preferred stock, shares outstanding | 0 | 0 |
Repurchase of common stock | 95,151 | 74,520 |
Average price per share | $ 37.82 | $ 21.65 |
Repurchase of common stock amount | $ 3,601,000 | $ 1,615,000 |
Maximum |  |  |
Class Of Stock [Line Items] |  |  |
Amount approved for common stock repurchase |  |  | $ 15,000,000

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