Quarterly report pursuant to Section 13 or 15(d)

Equity (Details Textual)

v3.8.0.1
Equity (Details Textual) - USD ($)
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Equity (Textual)    
Number of stock option granted 387,230  
Total option expense $ 600,000 $ 900,000
Unrecognized compensation expense 3,100,000  
Subscription received $ 56,284
Series A warrants [Member]    
Equity (Textual)    
Warrants exercise price $ 0.60  
Warrants exercisable period 1 year  
Fair value of warrants $ 500,000  
Fair value assumptions, expected discount rate 2.06%  
Fair value assumptions, expected life 1 year  
Fair value assumptions, expected volatility rate 71.00%  
Fair value assumptions, expected dividend rate 0.00%  
Aggregate series warrants 7,559,445  
Description of warrant exercisable Each series A warrant exercisable for one share of Common Stock at an exercise price of $0.60 per share.  
Series B warrants [Member]    
Equity (Textual)    
Warrants exercise price $ 0.70  
Warrants exercisable period 2 years 6 months  
Fair value of warrants $ 2,500,000  
Fair value assumptions, expected discount rate 1.33%  
Fair value assumptions, expected life 2 years 6 months  
Fair value assumptions, expected volatility rate 71.00%  
Fair value assumptions, expected dividend rate 0.00%  
Aggregate series warrants 22,678,393  
Description of warrant exercisable Each series B warrant exercisable for one share of Common Stock at an exercise price of $0.70 per share.  
Common Stock [Member]    
Equity (Textual)    
Sold aggregate of units 30,237,894  
Shares of common stock, Shares 30,237,894  
Warrant [Member]    
Equity (Textual)    
Number of stock option granted 30,241,538  
Gross proceeds $ 15,100,000  
Net proceeds $ 13,900,000  
Sale of units, price per unit $ 0.50  
Stock Options [Member]    
Equity (Textual)    
Number of stock option granted 840,000  
Stock options, term 10 years  
Stock options, vesting period 4 years  
Fair value of stock options $ 377,000  
Fair value assumptions, expected life 6 years  
Fair value assumptions, expected dividend rate 0.00%  
Stock Options [Member] | Minimum [Member]    
Equity (Textual)    
Fair value assumptions, expected discount rate 2.35%  
Fair value assumptions, expected volatility rate 80.09%  
Options exercise price $ 0.39  
Stock Options [Member] | Maximum [Member]    
Equity (Textual)    
Fair value assumptions, expected discount rate 2.72%  
Fair value assumptions, expected volatility rate 80.46%  
Options exercise price $ 0.72