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4. Stock Option Plans and Agreements (Details)
9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Risk-free interest rate, Minimum 0.77% 0.34%
Risk-free interest rate, Maximum 1.98% 2.15%
Expected dividend yield 0.00% 0.00%
Expected stock price volatility 100.00% 75.00%
Expected life of options, min 3 years 3 months 3 years 3 months
Expected life of options, max 5 years 9 months 5 years 9 months