Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Summary of Stock Options - Valuation Assumptions for Stock Options (Details)

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Note 8 - Summary of Stock Options - Valuation Assumptions for Stock Options (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Minimum [Member]        
Average volatility 61.00%   61.00%  
Risk-free interest rate 1.50%   1.29%  
Maximum [Member]        
Average volatility 62.00%   62.00%  
Risk-free interest rate 1.69%   1.69%  
Expected term (in years) 5 years 5 years 5 years 5 years
Average volatility   61.00%   61.00%
Risk-free interest rate   1.80%   1.80%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 0.00% 0.00% 0.00% 0.00%