Stock-Based Compensation - Stock Options (Details) - $ / shares |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2020 |
Feb. 05, 2020 |
Jun. 30, 2020 |
Jun. 30, 2019 |
Jun. 30, 2020 |
Jun. 30, 2019 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Options exercised (in shares) | 0 | 0 | 0 | 0 | ||
| 2011 Plan | ||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||
| Options granted in the period (in shares) | 20,000 | 123,500 | ||||
| Options granted in the period, weighted average exercise price (in dollars per share) | $ 7.329 | $ 12.995 | ||||
| Award vesting percentage | 33.00% | 33.00% | ||||
| Grants in the period, weighted average grant date fair value (in dollars per share) | $ 2.59 | $ 4.53 | ||||
| Risk free interest rate | 0.64% | 1.66% | ||||
| Expected term | 10 years | 10 years | ||||
| Expected volatility rate | 38.70% | 35.10% | ||||
| Expected dividend rate | 1.89% | 1.79% | ||||
| X | ||||||||||
- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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- Definition Percentage of vesting of award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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