Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Common Stock and Preferred Stock) (Narrative) (Details)

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Stockholders' Equity (Common Stock and Preferred Stock) (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2017
Common stock, increase in shares authorized 50,000,000    
Common Stock, shares authorized 150,000,000 100,000,000  
Common Stock, par value $ 0.001 $ 0.001  
Common Stock, shares outstanding 94,877,492 74,027,425  
Preferred Stock, Shares Authorized 15,000,000 15,000,000  
Preferred Stock, par value $ 0.001 $ 0.001  
Preferred Stock, shares issued 3,427,138 1,341,167  
Preferred Stock, shares outstanding 3,427,138 1,341,167  
Preferred Stock, liquidation preference per share $ 25.00 $ 25.00  
Series A Preferred Stock [Member]      
Preferred Stock, Shares Authorized 5,000,000    
Preferred Stock, par value $ 0.001    
Preferred Stock, shares issued   1,341,167  
Preferred Stock, shares outstanding 3,427,138    
Preferred Stock, dividend rate percentage 9.375%    
Preferred Stock, dividend payable per share per annum $ 2.34375   $ 0.299479
Preferred Stock, quarterly dividend rate per share $ 0.5839375    
Preferred Stock dividends $ 6.5 $ 2.6  
Preferred Stock, Redemption Terms may be redeemed in whole or in part (at the Company’s option) any time on or after December 15, 2022, upon not less than 30 days nor more than 60 days    
Preferred Stock, redemption price per share $ 25.00    
Preferred Stock, liquidation preference per share 25.00    
Series A Preferred Stock [Member] | Change of Control [Member]      
Preferred Stock, redemption price per share 25.00    
Preferred Stock, liquidation preference per share $ 25.00    
Preferred Stock to common stock conversion ratio 13.05483