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Note 3 - Derivative Instruments and Fair Value (Details Textual) (USD $)
3 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Derivative, Net Hedge Ineffectiveness Gain (Loss) $ 0us-gaap_DerivativeNetHedgeIneffectivenessGainLoss  
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Tax Effect 5,000cvu_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTaxEffect 5,000cvu_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTaxEffect
Deferred Gain (Loss) on Derivative, Net (13,700)cvu_DeferredGainLossOnDerivativenet (14,700)cvu_DeferredGainLossOnDerivativenet
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax 8,709us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax 9,716us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax
Other Noncurrent Liabilities [Member] | Interest Rate Swap [Member]    
Derivative Liability $ 13,709us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
$ 14,716us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember