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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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- Definition 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. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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