Quarterly report pursuant to Section 13 or 15(d)

Investments in Equity Securities (Details)

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Investments in Equity Securities (Details) - USD ($)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Debt and Equity Securities, FV-NI [Line Items]      
Cost $ 58,905,000    
Fair Value 335,000   $ 1,838,000
Unrealized loss on equity securities 1,503,000 $ 0  
Equity shares      
Debt and Equity Securities, FV-NI [Line Items]      
Cost 47,841,000    
Fair Value 272,000    
Equity rights      
Debt and Equity Securities, FV-NI [Line Items]      
Cost 11,064,000    
Fair Value $ 63,000