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Liquidity - Narrative (Details) - USD ($)
 1 Months Ended 3 Months Ended
Mar. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Class of Stock [Line Items]      
Convertible preferred stock, par value (in dollars per share) $ 0.001 $ 0.001  
Number of common stock warrants per unit (in shares) 1 1  
Preferred units, outstanding (in shares)   12,376,329  
Discounts and commissions $ 2,400,000    
Offering costs 500,000    
Subscription receivable $ 8,280,935 $ 8,280,935 $ 0
Series A Preferred Stock      
Class of Stock [Line Items]      
Number of preferred stock shares per unit (in shares) 1 1  
Subscription receivable $ 8,300,000 $ 8,300,000  
Private Placement      
Class of Stock [Line Items]      
Net cash proceeds 22,100,000    
Private Placement | Series A Preferred Stock      
Class of Stock [Line Items]      
Consideration received $ 25,000,000    
Net cash proceeds   $ 22,100,000