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Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deferred tax assets:    
Allowance for bad debts $ 853us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts $ 131us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts
Inventory and deferred preservation costs write-downs 873us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves 1,077us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves
Investment in equity securities 1,913us-gaap_DeferredTaxAssetsInvestments 1,959us-gaap_DeferredTaxAssetsInvestments
Property 2,934us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment 2,737us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment
Intangible assets 400us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets 422us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets
Accrued expenses 3,864us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities 3,766us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
Loss carryforwards 14,141us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 15,689us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Credit carryforwards 635us-gaap_DeferredTaxAssetsTaxCreditCarryforwards 241us-gaap_DeferredTaxAssetsTaxCreditCarryforwards
Stock compensation 2,367us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits 2,409us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits
Other 1,402us-gaap_DeferredTaxAssetsOther 1,108us-gaap_DeferredTaxAssetsOther
Less valuation allowance (2,145)us-gaap_DeferredTaxAssetsValuationAllowance (1,532)us-gaap_DeferredTaxAssetsValuationAllowance
Total deferred tax assets 27,237us-gaap_DeferredTaxAssetsNet 28,007us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities:    
Prepaid items (420)us-gaap_DeferredTaxLiabilitiesPrepaidExpenses (451)us-gaap_DeferredTaxLiabilitiesPrepaidExpenses
Intangible assets (4,652)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets (5,289)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets
Other (296)us-gaap_DeferredTaxLiabilitiesOther (220)us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liabilities (5,368)us-gaap_DeferredIncomeTaxLiabilities (5,960)us-gaap_DeferredIncomeTaxLiabilities
Total net deferred tax assets $ 21,869us-gaap_DeferredTaxAssetsLiabilitiesNet $ 22,047us-gaap_DeferredTaxAssetsLiabilitiesNet