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 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Expected term (in years) 5 years 5 years 5 years 5 years
Average volatility 47.00% 64.00% 65.00% 62.00%
Risk-free interest rate 1.26% 1.58% 1.53% 1.36%
Dividend yield 0.00% 0.00% 0.00% 0.00%