Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards [Line Items]
Statutory tax rate, percentage	21.00%	21.00%	21.00%
Deferred tax assets, net of operating losses	$ 7,900,000
Deferred tax assets, net of operating losses	700,000
Undistributed earnings of foreign subsidiaries	2,200,000
Capital loss carryforward	110,000,000	$ 113,700,000
Amended returns		3,700,000
Deferred tax assets, capital loss carryforwards	26,500,000
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	$ 400,000
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	6,600,000
Deferred tax assets, net of operating losses	400,000
Deferred tax assets, capital loss carryforwards	4,300,000
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Deferred tax assets, net of operating losses	900,000
Deferred tax assets, net of operating losses	$ 200,000