Quarterly report pursuant to Section 13 or 15(d)

Equity Transactions (Details)

v3.8.0.1
Equity Transactions (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Dec. 19, 2016
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Class of Stock [Line Items]        
Preferred stock dividend   $ 1,824 $ 1,824  
Series A Preferred Stock        
Class of Stock [Line Items]        
Preferred stock cumulative cash dividends rate   10.00%    
Preferred stock, liquidation preference (in dollars per share)   $ 50.00   $ 50.00
Preferred stock, dividend rate (in dollars per share)   5.00    
Common Stock        
Class of Stock [Line Items]        
Value of a share of common stock (in dollars per share)   $ 13.24    
Conversion ratio of preferred stock to common stock   3.8    
Shares of common stock issued in public offering (in shares) 40,000,000      
Proceeds from Issuance of common stock $ 634,934