Stock-Based Compensation (Schedule of Stock-Based Compensation) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Stock-Based Compensation [Abstract]
Stock-based compensation expense	$ 91	$ 67	$ 287	$ 190
Excess tax benefits related to stock-based compensation	2		3	11
Unrecognized stock-based compensation expense	$ 120	$ 143	$ 120	$ 143
Weighted average period unrecognized expense is expected to be recognized			3 months 18 days	6 months

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

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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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