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Note 10 - Equity Incentive Plan (Details) - Assumptions Used to Estimate Fair Value of Stock Options and Stock Appreciation Rights Awards
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Note 10 - Equity Incentive Plan (Details) - Assumptions Used to Estimate Fair Value of Stock Options and Stock Appreciation Rights Awards [Line Items]      
Expected volatility   57.60% 57.60%
Expected lives (years) 4 years 4 years 4 years
Expected dividend yield 0.00% 0.00% 0.00%
Minimum [Member]
     
Note 10 - Equity Incentive Plan (Details) - Assumptions Used to Estimate Fair Value of Stock Options and Stock Appreciation Rights Awards [Line Items]      
Risk free interest rate 0.61% 0.63% 1.10%
Expected volatility 53.60%    
Maximum [Member]
     
Note 10 - Equity Incentive Plan (Details) - Assumptions Used to Estimate Fair Value of Stock Options and Stock Appreciation Rights Awards [Line Items]      
Risk free interest rate 1.02% 0.64% 1.51%
Expected volatility 57.60%