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Note 9 - Income Taxes (Details) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2015
Dec. 31, 2012
Note 9 - Income Taxes (Details) [Line Items]            
Effective Income Tax Rate Reconciliation, Percent 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations    
Deferred Tax Assets, Operating Loss Carryforwards, Domestic     $ 13,900,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic      
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 0us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount   2,257,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount 1,642,000us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount    
Unrecognized Tax Benefits     97,000us-gaap_UnrecognizedTaxBenefits 83,000us-gaap_UnrecognizedTaxBenefits   83,000us-gaap_UnrecognizedTaxBenefits
Deferred Tax Assets, Operating Loss Carryforwards, State and Local     14,475,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal      
Deferred Tax Assets, Tax Credit Carryforwards, Research     189,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch 162,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch    
Scenario, Forecast [Member]            
Note 9 - Income Taxes (Details) [Line Items]            
Effective Income Tax Rate Reconciliation, Percent         0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations
/ us-gaap_StatementScenarioAxis
= us-gaap_ScenarioForecastMember		  
Domestic Tax Authority [Member]            
Note 9 - Income Taxes (Details) [Line Items]            
Operating Loss Carryforwards     14,487,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember		      
Deferred Tax Assets, Tax Credit Carryforwards, Research     165,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember		      
State and Local Jurisdiction [Member]            
Note 9 - Income Taxes (Details) [Line Items]            
Operating Loss Carryforwards     14,475,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		      
Deferred Tax Assets, Tax Credit Carryforwards, Research     $ 159,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember