Quarterly report pursuant to Section 13 or 15(d)

Liquidity and Management Plans (Details Textual)

v3.8.0.1
Liquidity and Management Plans (Details Textual) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Liquidity And Management Plans [Line Items]            
Engineering product development $ 250,000 $ 1,003,973 $ 1,124,874 $ 1,322,155    
Net income (loss) (12,748,248) (10,125,063) (38,140,398) (31,206,160)    
Cash and Cash Equivalents, at Carrying Value, Total $ 20,223,859 $ 24,956,255 20,223,859 24,956,255 $ 31,258,637 $ 29,872,564
Proceeds from Issuance of Common Stock     14,932,547 19,890,660 $ 49,720,858  
Net Cash Provided by (Used in) Operating Activities     $ (26,887,004) $ (24,439,565)