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Note 10 - Equity (Details) - Fair Value of Warrants Granted
12 Months Ended
Dec. 31, 2014
Fair Value of Warrants Granted [Abstract]  
Volatility 33.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Risk-free interest rate 0.78%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Expected term (years) 4 years