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Stock Based Compensation (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2004
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuance			400,000
Term of service completed before eligible for coverage		4 months
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for issuance				250,000
Minimum percent of fair value market option price	90.00%
Expiration date, maximum term from grant date, in years	1 year
Grant price, percent of the stock's fair value at the time of award	95.00%
ISOP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration date, maximum term from grant date, in years	10 years
Shares issued			0
Restricted Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 204,000	$ 197
Unrecognized compensation expense, restriced	$ 202,000
Restricted Plan [Member] | Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of service completed before eligible for coverage	1 year
Restricted Plan [Member] | Other Eligible Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of service completed before eligible for coverage	3 years

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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