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Income Taxes (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating Loss Carryforwards [Line Items]      
Statutory tax rate, percentage 21.00% 21.00% 21.00%
Deferred tax assets, net of operating losses $ 15,100,000    
Deferred tax assets, net of operating losses 700,000    
Undistributed earnings of foreign subsidiaries 4,200,000    
Lapses of applicable statute of limitations 0 $ 0 $ 329,000
Capital loss carryforward 113,800,000    
Deferred tax assets, capital loss carryforwards 27,300,000    
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 23,000,000    
State      
Operating Loss Carryforwards [Line Items]      
Deferred tax assets, net of operating losses 14,300,000    
Deferred tax assets, net of operating losses 500,000    
Deferred tax assets, capital loss carryforwards 4,300,000    
Foreign Tax Authority      
Operating Loss Carryforwards [Line Items]      
Deferred tax assets, net of operating losses 400,000    
Deferred tax assets, net of operating losses $ 100,000