Stock-Based Compensation (Narrative) (Details 3) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2023 USD ($) Number shares	Sep. 30, 2023 USD ($) Number shares	Sep. 30, 2023 USD ($) shares	Sep. 30, 2022 shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares granted during the period (in shares)			100,000	0
Number of shares expired during the period (in shares)			225,000	0
Number of shares exercised during the period (in shares)			0	7,500
Non-Qualified Stock Options [Member] | Chief Executive Officer and Three Non-Employee Board of Directors [Member] | Vesting on the first four anniversaries of the grant date
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting Percentage		20.00%
Unvested Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares granted during the period (in shares)			105,000
2013 Equity Incentive Plan [Member] | Stock Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Options expiration from date of grant			10 years
Options expiration from termination of employment or service due to death, disability, or termination other than for cause			12 months
Number of shares expired during the period (in shares)		225,000
Number of shares exercised during the period (in shares)				7,500
Unrecognized compensation expense related to outstanding stock options | $	$ 119	$ 119	$ 119
Recognition period expected for unrecognized compensation expense			5 years
Recognized compensation expense | $		$ 30	$ 30
2013 Equity Incentive Plan [Member] | Stock Options [Member] | Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock options fair market value (as a percent)			100.00%
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] | Non-Qualified Stock Options [Member] | Chief Executive Officer and Three Non-Employee Board of Directors [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares granted during the period (in shares)		25,000
Number of directors who have stock options granted in replacement of expired options | Number		3
2013 Equity Incentive Plan [Member] | Non-Qualified Stock Options [Member] | Chief Executive Officer and Three Non-Employee Board of Directors [Member] | Vested on grant date
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting Percentage		20.00%
2013 Equity Incentive Plan [Member] | Unvested Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of directors | Number	4
Recognition period expected for unrecognized compensation expense			5 years
Recognized compensation expense | $		$ 8	$ 8
Unrecognized compensation expense related to outstanding restricted stock units | $	$ 424	$ 424	$ 424
2013 Equity Incentive Plan [Member] | Unvested Restricted Stock Units [Member] | Vesting on the first anniversary of the grant date
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting Percentage	20.00%
2013 Equity Incentive Plan [Member] | Unvested Restricted Stock Units [Member] | Vesting on the second anniversary to fifth anniversary of the grant date
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting Percentage	20.00%
2013 Equity Incentive Plan [Member] | Unvested Restricted Stock Units [Member] | Chief Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares granted during the period (in shares)	35,000
2013 Equity Incentive Plan [Member] | Unvested Restricted Stock Units [Member] | Non-Employee Board of Director, One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares granted during the period (in shares)	17,500
2013 Equity Incentive Plan [Member] | Unvested Restricted Stock Units [Member] | Non-Employee Board of Director, Two [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares granted during the period (in shares)	17,500
2013 Equity Incentive Plan [Member] | Unvested Restricted Stock Units [Member] | Non-Employee Board of Director, Three [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares granted during the period (in shares)	17,500
2013 Equity Incentive Plan [Member] | Unvested Restricted Stock Units [Member] | Non-Employee Board of Director, Four [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares granted during the period (in shares)	17,500