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Stockholders' Equity (Narrative) (Details) - USD ($)
 3 Months Ended 12 Months Ended
Sep. 23, 2022
May 01, 2022
Mar. 24, 2022
Feb. 04, 2022
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Stockholders' Equity Note [Line Items]              
Preferred stock, par value per share         $ 0.01   $ 0.01
Preferred stock redeemed, value           $ 5,330,000  
Series D Preferred Stock [Member]              
Stockholders' Equity Note [Line Items]              
Preferred stock, dividend rate   4.50%       4.50%  
Preferred stock redeemed, shares   940          
Preferred stock, redemption price   $ 10,000          
Preferred stock redeemed, value   $ 9,400,000          
Series I Preferred Stock [Member]              
Stockholders' Equity Note [Line Items]              
Preferred stock, par value per share $ 0.01   $ 0.01        
Preferred stock, dividend rate         3.00% 3.00% 3.00%
Proceeds from issuance of private placement $ 4,440,000   $ 2,620,000        
Shares issued 444   260        
Series G Preferred Stock [Member]              
Stockholders' Equity Note [Line Items]              
Preferred stock, dividend rate       6.00%      
Preferred stock redeemed, shares       533      
Preferred stock, redemption price       $ 10,000      
Preferred stock redeemed, value       $ 5,300,000