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Common Stock - Additional Information (Details)
 9 Months Ended 12 Months Ended
Nov. 09, 2016
shares
Sep. 30, 2016
USD ($)
shares
Dec. 31, 2011
USD ($)
shares
Dec. 31, 2015
shares
Class Of Stock [Line Items]        
Common stock shares pledged under guarantee   5,896,000    
Common stock, shares authorized   33,000,000   33,000,000
Subsequent Event        
Class Of Stock [Line Items]        
Common stock split ratio 2,200      
Common stock, shares authorized 350,000,000      
Preferred stock, undesignated shares authorized 10,000,000      
Series A Preferred Stock        
Class Of Stock [Line Items]        
Common stock, shares issued     14,300,000  
Common stock, value issued | $     $ 0  
Convertible preferred stock value issued upon conversion | $   $ 1,179,000    
Convertible preferred stock, shares issued upon conversion   14,300,000    
Convertible preferred stock, settlement terms   the amount allocated to the Series A Investor’s common shares was accreted to the face value of the Series A Preferred Stock with a corresponding charge to interest expense over the 5-year term of the Series A Preferred Stock.    
Preferred shares corresponding charge interest expense period   5 years