Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
Statutory tax rate, percentage	21.00%	21.00%	21.00%
Deferred tax assets, net of operating losses	$ 17,500,000
Deferred tax assets, net of operating losses	1,100,000
Undistributed earnings of foreign subsidiaries	1,400,000
Capital loss carryforward	110,000,000		$ 113,700,000
Amended returns			3,700,000
Deferred tax assets, capital loss carryforwards	26,527,000	$ 26,490,000
Interest and penalties recognized	$ 0	$ 0	$ 0
Minimum
Operating Loss Carryforwards [Line Items]
Statute of limitations expiration period, in years	4 years
Maximum
Operating Loss Carryforwards [Line Items]
Statute of limitations expiration period, in years	10 years
Federal
Operating Loss Carryforwards [Line Items]
Deferred tax assets, net of operating losses	$ 300,000
Deferred tax assets, net of operating losses	100,000
Deferred tax assets, capital loss carryforwards	22,200,000
State
Operating Loss Carryforwards [Line Items]
Deferred tax assets, net of operating losses	16,500,000
Deferred tax assets, net of operating losses	800,000
Deferred tax assets, capital loss carryforwards	4,300,000
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Deferred tax assets, net of operating losses	700,000
Deferred tax assets, net of operating losses	$ 200,000