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Income Taxes Components of deferred tax assets and liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deferred tax assets:    
Compensation and benefits $ 11,926us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits $ 10,883us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits
Net operating loss carryforward 20,652us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 18,453us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Inventory reserve 2,723us-gaap_DeferredTaxAssetsInventory 2,734us-gaap_DeferredTaxAssetsInventory
Accounts receivable reserve 287us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts 353us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts
Other 3,372us-gaap_DeferredTaxAssetsOther 4,113us-gaap_DeferredTaxAssetsOther
Total deferred tax assets 38,960us-gaap_DeferredTaxAssetsGross 36,536us-gaap_DeferredTaxAssetsGross
Deferred tax liabilities:    
Property, plant and equipment 1,156us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment 53us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Other 1,078us-gaap_DeferredTaxLiabilitiesOther 590us-gaap_DeferredTaxLiabilitiesOther
Total deferred liabilities 2,234us-gaap_DeferredIncomeTaxLiabilities 643us-gaap_DeferredIncomeTaxLiabilities
Net deferred assets before valuation allowance 36,726laws_DeferredTaxAssetsNetOfDeferredTaxLiabilitiesBeforeValuationAllowance 35,893laws_DeferredTaxAssetsNetOfDeferredTaxLiabilitiesBeforeValuationAllowance
Valuation allowance (36,675)us-gaap_DeferredTaxAssetsValuationAllowance (35,834)us-gaap_DeferredTaxAssetsValuationAllowance
Net deferred assets 51us-gaap_DeferredTaxAssetsLiabilitiesNet 59us-gaap_DeferredTaxAssetsLiabilitiesNet
Net deferred tax assets:    
Net current deferred tax assets 0us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent 5us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent
Net noncurrent deferred tax assets 51us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent 54us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent
Net deferred assets $ 51us-gaap_DeferredTaxAssetsLiabilitiesNet $ 59us-gaap_DeferredTaxAssetsLiabilitiesNet