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