Stock-Based Compensation (Schedule of Stock-Based Compensation) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Stock-Based Compensation [Abstract]
Stock-based compensation expense	$ 99	$ 62	$ 196	$ 123
Excess tax benefits related to stock-based compensation	2	7	3	14
Unrecognized stock-based compensation expense	$ 230	$ 198	$ 230	$ 198
Weighted average period unrecognized expense is expected to be recognized			7 months 6 days	8 months 12 days

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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-Name Accounting Standards Codification
-Topic 718
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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for 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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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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