Note 5 - Stockholders' Equity - BSM Option Valuation Model Assumptions (Details) |
Feb. 20, 2015
$ / shares
|
---|---|
Warrant [Member] | Public Offering [Member] | |
Fair value of underlying common stock (in dollars per share) | $ 2.57 |
Exercise price (in dollars per share) | $ 3.50 |
Risk-free interest rate | 1.61% |
Volatility | 65.50% |
Dividend yield | 0.00% |
Contractual term (in years) | 5 years |
Weighted-average measurement date fair value per share (in dollars per share) | $ 1.23 |
Public Offering [Member] | Underwriter Options [Member] | |
Fair value of underlying common stock (in dollars per share) | 2.62 |
Exercise price (in dollars per share) | $ 2.60 |
Risk-free interest rate | 0.02% |
Volatility | 73.00% |
Dividend yield | 0.00% |
Contractual term (in years) | 43 days |
Weighted-average measurement date fair value per share (in dollars per share) | $ 0.27 |
Fair value of underlying common stock (in dollars per share) | $ 2.80 |