Quarterly report pursuant to Section 13 or 15(d)

8. Stock options and Warrants (Details Narrative)

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8. Stock options and Warrants (Details Narrative) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Valuation assumptions        
Proceeds from exercise of warrants     $ 647,000 $ 61,000
Options [Member]        
Weighted average remaining contractual life     5 years 4 months 24 days  
Options granted, shares     2,083,335  
Option exercisable price $ 0.18   $ 0.18  
Valuation assumptions        
Options vested, share based compensation expense $ 300,000 $ 102,000 $ 245,000 $ 535,000
Stock price $ 0.13   $ 0.13  
Aggregate intrinsic value of options outstanding $ 520,000   $ 520,000  
Future unamortized compensation expense on unvested outstanding options 209,000   $ 209,000  
Options [Member] | Board of Directors [Member]        
Options granted, shares     2,083,335  
Fair value of options at grant date     $ 313,000  
Valuation assumptions        
Expected life     5 years  
Risk free interest rate     1.70%  
Volatility     118.00%  
Expected dividend yield     0.00%  
Warrants [Member]        
Valuation assumptions        
Warrants granted     2,189,688  
Warrant exercise price     $ 0.08  
Aggregate intrinsic value of warrants outstanding $ 77,000   $ 77,000  
Stock issued for exercise of warrants, shares     12,217,773  
Proceeds from exercise of warrants     $ 634,000