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Preferred Stock (Details)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2013
shares
Aug. 29, 2012
Dec. 31, 2013
USD ($)
shares
Dec. 31, 2014
shares
Dec. 31, 2015
shares
Class of Stock [Line Items]          
Preferred stock to debt and common stock exchange (in shares)     183,496    
Preferred stock, shares outstanding       0 0
Conversion rate of the preferred stock to common stock 14.1844     14.1844  
Common Stock          
Class of Stock [Line Items]          
Conversion of stock, shares Issued 3,316,922        
Preferred stock conversions, inducements 75,342        
Common stock issuable upon conversion, shares     2,602,770    
Series B Cumulative Perpetual Convertible Preferred Stock          
Class of Stock [Line Items]          
Preferred stock to debt and common stock exchange (in shares) 233,843        
Preferred Stock, Cumulative Dividend Rate (In Percent)   7.50%      
Preferred stock, shares outstanding       0 0
Redemption of preferred stock (in shares)     300 300  
Payments for repurchase of convertible preferred stock | $     $ 30