Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stock Plans and Stock Based Compensation (Details) - Black-Scholes Valuation Model Assumptions

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Note 6 - Stock Plans and Stock Based Compensation (Details) - Black-Scholes Valuation Model Assumptions (USD $)
 9 Months Ended
Sep. 30, 2014
Sep. 30, 2014
Director Stock Options [Member]
Sep. 30, 2013
Employee Stock Option [Member]
Note 6 - Stock Plans and Stock Based Compensation (Details) - Black-Scholes Valuation Model Assumptions [Line Items]      
Weighted-average fair value per share (in Dollars per share) $ 2.88 $ 2.73 $ 1.96
Risk -free interest rate (1) 1.91% [1] 2.63% [1] 2.92% [1]
Expected volatility of stock (2) 61.84% [2] 59.59% [2] 58.88% [2]
Expected option life (3) (years) 6 years [3] 10 years [3] 10 years [3]
[1] The risk-free interest rate is based on the U.S. Treasury yield in effect at the grant date over the expected term of the option.
[2] The expected volatility is based on historical volatility from our traded Common Stock over the expected term of the option.
[3] The expected option life is based on historical exercises and post-vesting data.