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Debt (Details Narrative)
1 Months Ended 2 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
May 08, 2015
USD ($)
shares
May 31, 2015
USD ($)
Mar. 31, 2015
USD ($)
$ / shares
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
shares
Jun. 30, 2016
shares
Jun. 27, 2016
shares
Jul. 14, 2015
Debt Instrument [Line Items]                            
Proceeds from notes payable             $ 0 $ 204,895 $ 204,895 $ 1,741,667        
Debt conversion, converted instrument, amount                 0 2,100,000        
Interest expense, debt       $ 90,317 $ 41,423   173,974 109,806 143,347 1,801,320        
Amortization of financing costs   $ 7,142,100,000                        
Fair value adjustment of warrants       $ (9,739,500,000) $ 0   $ (12,413,900,000) $ 0            
Merck Ghi Financing Agreement [Member]                            
Debt Instrument [Line Items]                            
Long-term debt, gross                 1,000,000 $ 1,000,000        
Debt instrument, interest rate, stated percentage                           8.00%
I P O [Member]                            
Debt Instrument [Line Items]                            
Debt conversion, converted instrument, shares issued | shares 350,000                          
Common stock percent                   110.00%        
Private Placement [Member]                            
Debt Instrument [Line Items]                            
Class of warrant or right, number of securities called by warrants or rights | shares                       271,606 271,606  
Over Allotment Option [Member]                            
Debt Instrument [Line Items]                            
Class of warrant or right, number of securities called by warrants or rights | shares 3,272,500                          
Common Stock [Member] | Over Allotment Option [Member]                            
Debt Instrument [Line Items]                            
Class of warrant or right, number of securities called by warrants or rights | shares 185,250                          
Loans Payable [Member]                            
Debt Instrument [Line Items]                            
Debt instrument, interest rate, stated percentage                   8.00%        
Commercial Paper [Member] | Common Stock [Member] | Merck Global Health Innovation Fund Llc [Member]                            
Debt Instrument [Line Items]                            
Long-term debt, gross                 $ 1,000,000          
Convertible Notes2015 [Member]                            
Debt Instrument [Line Items]                            
Debt instrument, interest rate, stated percentage     8.00%                      
Proceeds from other short-term debt     $ 1,500,000                      
Fair value adjustment of warrants $ 700,000                          
Convertible Notes2015 [Member] | I P O [Member]                            
Debt Instrument [Line Items]                            
Debt conversion, converted instrument, shares issued | shares                   75,000        
Convertible Notes2015 [Member] | Before Closing Ipo [Member]                            
Debt Instrument [Line Items]                            
Debt instrument, convertible, conversion ratio     1.25                      
Convertible Notes2015 [Member] | After Closing Ipo [Member]                            
Debt Instrument [Line Items]                            
Debt instrument, convertible, conversion ratio     1.00                      
Convertible Notes2015 [Member] | Common Stock [Member]                            
Debt Instrument [Line Items]                            
Debt instrument, convertible, conversion price | $ / shares     $ 1.00                      
Class of warrant or right, number of securities called by warrants or rights | shares                   9,000        
Demand Notes Payable [Member]                            
Debt Instrument [Line Items]                            
Debt conversion, converted instrument, amount $ 2,100,000                          
Convertible Notes2014 [Member]                            
Debt Instrument [Line Items]                            
Proceeds from convertible debt           $ 1,500,000                
Convertible Notes2014 [Member] | I P O [Member]                            
Debt Instrument [Line Items]                            
Debt conversion, converted instrument, shares issued | shares                     60,000