XML 62 R72.htm IDEA: XBRL DOCUMENT v2.4.1.9
Note 16 - Stock Option and Purchase Plans (Details) - Estimate Fair Value of Options Granted
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Estimate Fair Value of Options Granted [Abstract]    
Expected life (years) 4 years 4 years
Expected volatility 53.30%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate 81.10%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Risk-free interest rates 1.73%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 0.77%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Expected dividend yield 2.67%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate 1.97%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate