Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Deficit and Redeemable Convertible Series B and Convertible Series C & D Preferred Stock (Details)

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Stockholders' Deficit and Redeemable Convertible Series B and Convertible Series C & D Preferred Stock (Details)
 6 Months Ended
Jun. 30, 2017
USD ($)
$ / shares
Class of Warrant or Right [Line Items]  
Warrants vested and outstanding | $ $ 11,649,500
Pre 2015 Common Stock Warrants  
Class of Warrant or Right [Line Items]  
Warrant exercise price | $ / shares $ 1.00
Warrants vested and outstanding | $ $ 4,000,000
Pre 2015 Common Stock Warrants | Minimum  
Class of Warrant or Right [Line Items]  
Term of warrant 6 years
Pre 2015 Common Stock Warrants | Maximum  
Class of Warrant or Right [Line Items]  
Term of warrant 10 years
2015 Common Stock Warrants  
Class of Warrant or Right [Line Items]  
Warrants vested and outstanding | $ $ 442,000
2015 Common Stock Warrants | Minimum  
Class of Warrant or Right [Line Items]  
Warrant exercise price | $ / shares $ 1.15
Term of warrant 5 years
2015 Common Stock Warrants | Maximum  
Class of Warrant or Right [Line Items]  
Warrant exercise price | $ / shares $ 5.00
Term of warrant 10 years
2015 series B financing Common Stock Warrants to Series B Stockholders  
Class of Warrant or Right [Line Items]  
Warrant exercise price | $ / shares $ 0.25
Term of warrant 5 years
Warrants vested and outstanding | $ $ 6,250,000
2015 Series B financing Placement Agent Warrants  
Class of Warrant or Right [Line Items]  
Warrant exercise price | $ / shares $ 0.25
Term of warrant 5 years
Warrants vested and outstanding | $ $ 187,500
2016 Common Stock Warrants to Service Providers  
Class of Warrant or Right [Line Items]  
Warrant exercise price | $ / shares $ 1.15
Term of warrant 10 years
Warrants vested and outstanding | $ $ 40,000
2016 Series C Placement Agent Warrants  
Class of Warrant or Right [Line Items]  
Warrant exercise price | $ / shares $ 0.40
Term of warrant 5 years
Warrants vested and outstanding | $ $ 125,000
2017 Series D Placement Agent Warrants  
Class of Warrant or Right [Line Items]  
Warrant exercise price | $ / shares $ 0.25
Term of warrant 5 years
Warrants vested and outstanding | $ $ 480,000
2017 Common Stock Warrants to Service Providers  
Class of Warrant or Right [Line Items]  
Warrant exercise price | $ / shares $ 0.41
Term of warrant 5 years
Warrants vested and outstanding | $ $ 125,000