Quarterly report pursuant to Section 13 or 15(d)

Mandatorily Redeemable Series B Preferred Stock (Details)

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Mandatorily Redeemable Series B Preferred Stock (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Jun. 05, 2019
Class of Stock [Line Items]        
Warrants expiration period       7 years
Common stock issued for payment of series B preferred stock dividend (in shares) 300,000   600,000  
Amortization of discount $ 0.4   $ 0.8  
Mandatorily Redeemable Preferred Stock        
Class of Stock [Line Items]        
Exercise price of warrants (in usd per share)   $ 1.62    
Value of warrants issued with preferred stock   $ 6.7    
Mandatory Redeemable Series B Preferred Stock        
Class of Stock [Line Items]        
Shares issued (in shares)       1,250,000
Preferred stock stated value (in usd per share)       $ 20.00
Aggregate purchase price, warrants       $ 25.0
Mandatory Redeemable Series B Preferred Stock | Mandatorily Redeemable Preferred Stock        
Class of Stock [Line Items]        
Number of securities called by each warrant (in shares)       7.41
Preferred stock dividend rate (percentage)   8.00%