Annual report pursuant to Section 13 and 15(d)

Preferred Stock (Details)

v3.21.1
Preferred Stock (Details) - $ / shares
Dec. 31, 2020
Jan. 14, 2019
Apr. 20, 2018
Class of Stock [Line Items]      
Preferred stock, shares authorized (in shares) 5,000,000    
Preferred stock, par value (in usd per share) $ 0.001    
Series 4 Convertible Preferred Stock      
Class of Stock [Line Items]      
Preferred stock, shares authorized (in shares)     10,415
Preferred stock, par value (in usd per share)     $ 1,000
Series preferred stock conversion value (in shares)     $ 828.00
Preferred stock, shares outstanding (in shares) 1    
Series 5 Convertible Preferred Stock      
Class of Stock [Line Items]      
Preferred stock, shares authorized (in shares)   12,000  
Preferred stock, par value (in usd per share)   $ 1,000  
Series preferred stock conversion value (in shares)   $ 149.85  
Preferred stock, shares outstanding (in shares) 126