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Consolidated Statement of Stockholders' Equity (Unaudited) - 9 months ended Sep. 30, 2018 - USD ($)
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Total
Balance at Dec. 31, 2017 $ 15,009 $ 126,416,869 $ (110,422,825) $ 16,009,053
Balance, shares at Dec. 31, 2017 15,009,246      
Stock-based compensation expense 168,160 168,160
Exercise of stock options $ 594 686,927 687,521
Exercise of stock options, shares 593,838      
Vesting of restricted stock $ 29 (29)
Vesting of restricted stock, shares 29,112      
Net loss (3,299,551) (3,299,551)
Balance at Sep. 30, 2018 $ 15,632 $ 127,271,927 $ (113,722,376) $ 13,565,183
Balance, shares at Sep. 30, 2018 15,632,196