Quarterly report pursuant to Section 13 or 15(d)

Warrants - Preferred Stock Warrants Narrative (Details)

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Warrants - Preferred Stock Warrants Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2024
May 03, 2024
Apr. 09, 2024
Dec. 31, 2023
Sep. 29, 2023
Feb. 05, 2023
Jul. 11, 2022
Class of Warrant or Right [Line Items]                
Preferred stock, shares authorized (in shares) 10,000,000 10,000,000     10,000,000      
Warrant exercise price (in dollars per share) $ 264.50 $ 264.50            
Warrant Agreement                
Class of Warrant or Right [Line Items]                
Warrants outstanding (in shares)             2,200,000 2,700,000
Warrant exercise price (in dollars per share)               $ 49.45
Class of warrant or right exercised (in share) 0 0            
Warrant Agreement | August 2023 PIPE Warrants                
Class of Warrant or Right [Line Items]                
Class of warrant or right exercised (in share) 0 0            
7.5% Series B Cumulative Perpetual Redeemable Preferred Stock | Series B Preferred Stock Purchase Agreement                
Class of Warrant or Right [Line Items]                
Preferred stock, shares authorized (in shares)           45,000    
Aggregate fair value           $ 5.9    
Warrants fair value $ 1.2 $ 1.2            
Unrealized gain (loss) (1.4) (3.3)            
7.5% Series B Cumulative Perpetual Redeemable Preferred Stock | Series B Preferred Stock Purchase Agreement | Warrant Agreement                
Class of Warrant or Right [Line Items]                
Warrants outstanding (in shares)           1,000,000    
Common Stock | Series B Preferred Stock Purchase Agreement | Warrant Agreement                
Class of Warrant or Right [Line Items]                
Warrants outstanding (in shares)           1,000,000.0    
Warrant exercise price (in dollars per share)           $ 12.91    
Common Stock | Series C Preferred Stock Purchase Agreement | Warrant Agreement                
Class of Warrant or Right [Line Items]                
Warrants outstanding (in shares)     2,900,000 4,500,000        
Warrant exercise price (in dollars per share)       $ 2.24        
Series C Cumulative Perpetual Redeemable Preferred Stock | Series C Preferred Stock Purchase Agreement                
Class of Warrant or Right [Line Items]                
Aggregate fair value     $ 17.2          
Warrants fair value 12.8 12.8            
Unrealized gain (loss) $ 4.4 $ 4.4