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Note 16 - Stock Option and Purchase Plans (Details) - Estimate Fair Value of Options Granted
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Estimate Fair Value of Options Granted [Abstract]    
Expected life (years) 4 years 4 years
Expected volatility 81.10% 100.30%
Risk-free interest rates 0.77% 1.01%
Expected dividend yield 1.97% 1.62%