Quarterly report pursuant to Section 13 or 15(d)

Equity (Details)

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Equity (Details)
 1 Months Ended 3 Months Ended
Mar. 03, 2017
USD ($)
$ / shares
shares
Feb. 28, 2017
$ / shares
shares
Mar. 31, 2017
USD ($)
$ / shares
shares
Mar. 31, 2016
USD ($)
Class of Stock [Line Items]        
Net proceeds from the issuance of stock | $     $ 13,657,331 $ 0
Preferred stock, shares authorized (in shares)     10,000,000  
Preferred Stock, par value (in dollars per share) | $ / shares     $ 0.001  
Preferred stock, shares issued (in shares)     1,518,430  
Private Placement        
Class of Stock [Line Items]        
Gross proceeds from the issuance of equity | $ $ 15,000,000      
Net proceeds from the issuance of stock | $ 13,657,331      
Payments of stock issuance costs | $ $ 1,100,000      
Private Placement | Common Stock        
Class of Stock [Line Items]        
Number of shares issued in transaction (in shares) 5,220,826      
Private Placement | Preferred Stock        
Class of Stock [Line Items]        
Number of shares issued in transaction (in shares) 708,430      
Definitive Securities Purchase Agreement | Private Placement        
Class of Stock [Line Items]        
Number of shares called by each warrant (in shares) 1      
Sale of stock and warrants (in dollars per share) | $ / shares $ 2.535      
Number of shares called by warrants (in shares) 5,929,256      
Convertible preferred stock        
Class of Stock [Line Items]        
Preferred stock, shares authorized (in shares)   3,000,000    
Preferred Stock, par value (in dollars per share) | $ / shares   $ 0.001    
Preferred Stock, stated value, per share (in dollars per share) | $ / shares   $ 2.535    
Conversion ratio   1    
Maximum beneficial ownership, percentage   4.99%    
Preferred stock, shares issued (in shares)     1,518,430