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Stock Compensation Plans - Additional Information (Details)	12 Months Ended
	Dec. 31, 2020 shares	Dec. 31, 2019 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding	971,107	807,868
Ratio of shares utilized for awards other than stock options and stock appreciation rights	2.5
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	25.00%
2003 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	598,224
Number of options outstanding	31,591
2013 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	700,000
Number of options outstanding	384,866
2018 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized	800,000
Number of options outstanding	554,650

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Represents the ratio of shares utilized for awards other than stock options and stock appreciation rights.

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Number of shares authorized for issuance under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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