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Stock-Based Compensation (Narrative) (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) Number shares | Dec. 31, 2022 USD ($) shares | Dec. 31, 2021 shares
Employee Stock Option [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, Number of Shares | 100,000 | 0 |
Exercised, Number of Shares | 0 | 32,500 |
Number of shares available for purchase | 175,000 | 300,000 | 332,500
Canceled/forfeited/expired, Number of Shares | 225,000 | 0 |
Unvested Restricted Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, Number of Shares | 105,000 |  |
2013 Equity Incentive Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock options fair market value | 100.00% |  |
Options expiration from date of grant | 10 years |  |
Options expiration from date of death | 1 year |  |
Granted, Number of Shares |  | 0 |
Maximum amount of options authorized | 600,000 |  |
Number of shares available for purchase | 175,000 |  |
Number of shares exercisable | 95,000 |  |
Number of shares available for grant | 295,000 |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period |  | 25,000 |
2013 Equity Incentive Plan [Member] | Employee Stock Option [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Recognized compensation expense | $ | $ 38 | $ 3 |
Unrecognized compensation expense | $ | $ 111 |  |
Number of years to recognize remaining expense | 4 years |  |
2013 Equity Incentive Plan [Member] | Non-Qualified Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of directors | Number | 4 |  |
2013 Equity Incentive Plan [Member] | Unvested Restricted Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, Number of Shares | 105,000 |  |
Recognized compensation expense | $ | $ 29 |  |
Number of years to recognize remaining expense | 5 years |  |
Number of directors | Number | 4 |  |
Unrecognized compensation expense related to outstanding restricted stock units | $ | $ 403 |  |
2013 Equity Incentive Plan [Member] | Vested on grant date | Non-Qualified Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting Percentage | 20.00% |  |
2013 Equity Incentive Plan [Member] | Vesting on the first anniversary of the grant date [Member] | Non-Qualified Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting Percentage | 20.00% |  |
2013 Equity Incentive Plan [Member] | Vesting on the first anniversary of the grant date [Member] | Unvested Restricted Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting Percentage | 20.00% |  |
2013 Equity Incentive Plan [Member] | Vesting on the second anniversary to fifth anniversary of the grant date | Unvested Restricted Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting Percentage | 20.00% |  |
2013 Equity Incentive Plan [Member] | Three Non-Employee Board of Directors [Member] | Non-Qualified Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of directors | Number | 3 |  |
2013 Equity Incentive Plan [Member] | Chief Executive Officer [Member] | Non-Qualified Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, Number of Shares | 25,000 |  |
2013 Equity Incentive Plan [Member] | Chief Executive Officer [Member] | Unvested Restricted Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, Number of Shares | 35,000 |  |
2013 Equity Incentive Plan [Member] | Non-Employee Board of Director, One [Member] | Non-Qualified Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, Number of Shares | 25,000 |  |
2013 Equity Incentive Plan [Member] | Non-Employee Board of Director, One [Member] | Unvested Restricted Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, Number of Shares | 17,500 |  |
2013 Equity Incentive Plan [Member] | Non-Employee Board of Director, Two [Member] | Non-Qualified Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, Number of Shares | 25,000 |  |
2013 Equity Incentive Plan [Member] | Non-Employee Board of Director, Two [Member] | Unvested Restricted Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, Number of Shares | 17,500 |  |
2013 Equity Incentive Plan [Member] | Non-Employee Board of Director, Three [Member] | Non-Qualified Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, Number of Shares | 25,000 |  |
2013 Equity Incentive Plan [Member] | Non-Employee Board of Director, Three [Member] | Unvested Restricted Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, Number of Shares | 17,500 |  |
2013 Equity Incentive Plan [Member] | Non-Employee Board of Director, Four [Member] | Unvested Restricted Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Granted, Number of Shares | 17,500 |  |
1997 Stock Option Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Exercised, Number of Shares |  | 7,500 |
Maximum amount of options authorized | 450,000 |  |
Number of shares exercisable | 0 |  |

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