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SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Segment
Dec. 31, 2013
Dec. 31, 2009
Consolidation Policy [Abstract]      
Percentage of voting interest (in hundredths) 50.00%katy_MinimumPercentageOfVotingInterestInSubsidiaries    
Deferred Revenue [Abstract]      
Revenues $ 200,000us-gaap_Revenues $ 2,100,000us-gaap_Revenues  
Deferred revenue 300,000us-gaap_DeferredRevenue    
Deferred revenue, current 186,000us-gaap_DeferredRevenueCurrent 186,000us-gaap_DeferredRevenueCurrent  
Deferred revenue, noncurrent 130,000us-gaap_DeferredRevenueNoncurrent 316,000us-gaap_DeferredRevenueNoncurrent  
Advertising Costs [Abstract]      
Advertising costs 400,000us-gaap_AdvertisingExpense 300,000us-gaap_AdvertisingExpense  
Inventories [Abstract]      
Percentage of LIFO inventory (in hundredths) 78.00%us-gaap_PercentageOfLIFOInventory 80.00%us-gaap_PercentageOfLIFOInventory  
FIFO over LIFO evaluation 4,700,000us-gaap_ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue 4,400,000us-gaap_ExcessOfReplacementOrCurrentCostsOverStatedLIFOValue  
Loss on LIFO valuation adjustments 300,000us-gaap_InventoryAdjustments 100,000us-gaap_InventoryAdjustments  
Raw materials 6,457,000us-gaap_InventoryRawMaterialsAndSupplies 5,803,000us-gaap_InventoryRawMaterialsAndSupplies  
Finished goods 14,714,000us-gaap_InventoryFinishedGoods 9,101,000us-gaap_InventoryFinishedGoods  
Inventory reserves (618,000)us-gaap_InventorySuppliesNetOfReserves (534,000)us-gaap_InventorySuppliesNetOfReserves  
LIFO reserve (4,672,000)us-gaap_InventoryLIFOReserve (4,366,000)us-gaap_InventoryLIFOReserve  
Total inventories 15,881,000us-gaap_InventoryNet 10,004,000us-gaap_InventoryNet  
Goodwill [Abstract]      
Number of reporting unit 1us-gaap_NumberOfReportingUnits    
Goodwill impairment 0us-gaap_GoodwillImpairmentLoss    
Property, Plant and Equipment [Line Items]      
Depreciation expense 1,996,000us-gaap_Depreciation 2,034,000us-gaap_Depreciation  
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]      
Asset retirement obligation, assets 100,000katy_AssetRetirementObligationAssets    
Tenant improvement allowance     700,000us-gaap_PaymentsForProceedsFromTenantAllowance
Asset retirement obligation, Beginning balance 681,000us-gaap_AssetRetirementObligation 651,000us-gaap_AssetRetirementObligation  
Accretion expense 31,000us-gaap_AssetRetirementObligationAccretionExpense 30,000us-gaap_AssetRetirementObligationAccretionExpense  
Asset retirement obligation, Ending balance 712,000us-gaap_AssetRetirementObligation 681,000us-gaap_AssetRetirementObligation  
Deferred rent liability 300,000us-gaap_DeferredRentCredit 400,000us-gaap_DeferredRentCredit 700,000us-gaap_DeferredRentCredit
Segment Reporting [Abstract]      
Number of segments 1us-gaap_NumberOfOperatingSegments    
Accumulated Other Comprehensive Loss [Abstract]      
Foreign currency translation adjustments 700,000us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax 600,000us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax  
Pension and other postretirement benefits adjustments 800,000us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax 300,000us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock appreciation right expense (income) $ 27,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1 $ (13,000)us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1  
Stock options granted (in shares) 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross  
Minimum [Member]      
Assumptions for expected term, volatility and risk-free rate [Abstract]      
Expected term (years) 1 year 8 months 12 days 0 years 1 month 6 days  
Volatility (in hundredths) 22990.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 30220.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Risk-free interest rate (in hundredths) 50.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 10.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		  
Maximum [Member]      
Assumptions for expected term, volatility and risk-free rate [Abstract]      
Expected term (years) 4 years 8 months 12 days 4 years 8 months 12 days  
Volatility (in hundredths) 33890.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 36830.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Risk-free interest rate (in hundredths) 160.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		 160.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		  
Buildings [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 10 years    
Buildings [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 40 years    
Machinery and Equipment [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 3 years    
Machinery and Equipment [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Estimated useful life 20 years