Quarterly report [Sections 13 or 15(d)]

Net Income (Loss) per Common Share (Schedule of Potentially Dilutive Securities Excluded from Computation of Net Loss Per Common Share) (Details)

v3.25.3
Net Income (Loss) per Common Share (Schedule of Potentially Dilutive Securities Excluded from Computation of Net Loss Per Common Share) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share        
Effect of Series A preferred dividends on net income (loss) per share calculation $ 2.0 $ 2.0 $ 6.0 $ 6.0
Effect of partner company deemed dividends on net income (loss) per share calculation $ 0.2 $ 0.2 $ 0.4 $ 1.0
Potentially dilutive securities     18,186,673 17,401,999
Warrants to purchase Common Stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share        
Potentially dilutive securities     13,050,619 14,499,535
Options to purchase Common Stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share        
Potentially dilutive securities     18,896 558,896
Unvested Restricted Stock and deferred Restricted Stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share        
Potentially dilutive securities     2,368,386 1,804,742
Unvested Restricted Stock units and deferred Restricted Stock units        
Antidilutive Securities Excluded from Computation of Earnings Per Share        
Potentially dilutive securities     2,748,772 538,826