Quarterly report pursuant to Section 13 or 15(d)

Equity (Details Textual)

v3.5.0.2
Equity (Details Textual) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Equity (Textual)          
Stock based compensation expense $ 900,000 $ 900,000 $ 1,700,000 $ 1,900,000  
Fair value assumptions, expected volatility rate [1]     88.00%   87.00%
Fair value assumptions, expected term     1 year 6 months   2 years
Fair value assumptions, expected dividend rate [2]      
Stock-based compensation     $ 2,062,285 5,174,221  
Unrecognized compensation expense $ 8,300,000   $ 8,300,000    
Stock Options [Member]          
Equity (Textual)          
Number of stock option granted     1,945,000    
Share-based compensation term     10 years    
Share-based compensation vesting period     4 years    
Fair value of stock option     $ 3,000,000    
Fair value assumptions, expected term     6 years    
Fair value assumptions, expected dividend rate     0.00%    
Stock-based compensation     $ 200,000    
Stock Options [Member] | Minimum [Member]          
Equity (Textual)          
Exercise price $ 1.79   $ 1.79    
Fair value assumptions, expected discount rate     1.32%    
Fair value assumptions, expected volatility rate     85.61%    
Stock Options [Member] | Maximum [Member]          
Equity (Textual)          
Exercise price $ 2.25   $ 2.25    
Fair value assumptions, expected discount rate     1.66%    
Fair value assumptions, expected volatility rate     87.95%    
Common Stock [Member]          
Equity (Textual)          
Common stock issued, shares     3,081,071    
Proceeds from common stock issued     $ 6,200,000    
Warrant [Member]          
Equity (Textual)          
Common stock issued, shares     125,862    
Common shares issued for cashless exercise of warrants     125,862    
Stock based compensation expense $ 43,000 77,000 $ 100,000 100,000  
Number of stock option granted     10,000    
Exercise price $ 1.77   $ 1.77    
Warrants exercised by warrant holders     183,718    
Restricted Stock [Member]          
Equity (Textual)          
Number of shares of restricted stock, vested     19,750    
Stock based compensation expense $ 100,000 $ 2,000,000 $ 200,000 $ 3,200,000  
Share-based compensation option vested number of shares     75,000    
Restricted Stock [Member] | Consultant [Member]          
Equity (Textual)          
Number of shares of restricted stock, granted     85,750    
Restricted stock granted value     $ 173,850    
Share-based compensation option vested number of shares     10,750    
[1] As of June 30, 2016 and December 31, 2015, the volatility was estimated using the historical volatilities of the Company's common stock traded in NYSE MKT market.
[2] Management determined the dividend yield to be 0% based upon its expectation that it will not pay dividends for the foreseeable future.