Stockholders' Equity - Investment (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Jun. 03, 2015
Apr. 29, 2015
Dec. 31, 2015
Dec. 31, 2014
Proceeds from Issuance of Common Stock       $ 32,058
Common Stock        
Shares issued     21,000 9,861
Private Placement [Member] | Red River Investment Limited        
Shares issued   21,000    
Shares Issued, Price Per Share   $ 6.00    
Proceeds from Issuance of Common Stock   $ 125,156    
Initial Closing [Member] | Red River Investment Limited        
Shares issued   12,500    
Second Closing [Member] | Red River Investment Limited        
Shares issued 8,500