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Stock-Based Compensation (Valuation Assumptions, Options) (Details) - Time-Vested Stock Options [Member]	12 Months Ended
	Dec. 31, 2020 $ / shares
4/23/2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2019
Grant Date	Apr. 23, 2019
Expected Life	6 years
Expected Volatility	44.87%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	2.40%
Fair Value Per Award	$ 3.50
1/14/2019 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2019
Grant Date	Jan. 14, 2019
Expected Life	6 years
Expected Volatility	44.87%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	2.57%
Fair Value Per Award	$ 3.43
1/12/2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Year	2018
Grant Date	Jan. 12, 2018
Expected Life	6 years
Expected Volatility	44.25%
Expected Dividend Yield	0.00%
Risk Free Interest Rate	2.42%
Fair Value Per Award	$ 7.57

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Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Fair Value Per Award

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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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.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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-Publisher FASB
-Name Accounting Standards Codification
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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.

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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.

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