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Note 1 - Summary of Significant Accounting Policies (Details) - Estimated Fair Market Value Assumptions - ESPP (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Estimated Fair Market Value Assumptions - ESPP [Abstract]      
Expected volatility 45.70% 53.50% 65.20%
Dividend yield 0.00% 0.00% 0.00%
Risk-free interest rate 0.06% 0.07% 0.06%
Expected life (in years) 3 months 3 months 3 months
Fair value (in Dollars per share) $ 4.01 $ 1.54 $ 1.19