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Schedule of Deferred Tax Assets and Liabilities (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Details    
Depreciation and amortization $ (1,107,275)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment $ (1,065,275)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Inventory 283,359us-gaap_DeferredTaxAssetsInventory 256,474us-gaap_DeferredTaxAssetsInventory
Accrued vacation 108,642us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation 100,314us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation
Allowance for doubtful accounts 53,625us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts 52,500us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts
Other, net 565us-gaap_DeferredTaxAssetsOther 903us-gaap_DeferredTaxAssetsOther
Deferred Tax Assets and Liabilities $ (661,084)us-gaap_DeferredTaxAssetsLiabilitiesNet $ (655,084)us-gaap_DeferredTaxAssetsLiabilitiesNet