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Income Taxes - Components of Deferred Income Tax Assets and Liabilities (Detail) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Deferred income tax assets:    
Net operating loss carryforward $ 343,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwards $ 513,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Deferred warranty revenue 4,141,000tasr_DeferredTaxAssetsDeferredWarrantyRevenue 2,837,000tasr_DeferredTaxAssetsDeferredWarrantyRevenue
Inventory reserve 508,000us-gaap_DeferredTaxAssetsInventory 389,000us-gaap_DeferredTaxAssetsInventory
Non-qualified and non-employee stock option expense 3,094,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost 3,518,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Capitalized research and development 4,847,000tasr_DeferredTaxAssetsCapitalizedResearchAndDevelopment 6,588,000tasr_DeferredTaxAssetsCapitalizedResearchAndDevelopment
Alternative minimum tax carryforward 1,081,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax 1,466,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax
Research and development tax credit carryforward 2,139,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch 3,165,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch
Deferred legal settlement 0us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLegalSettlements 1,294,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLegalSettlements
IRC section 481(a) adjustment—tangible property 0us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment 1,316,000us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment
Reserves, accruals, and other 2,320,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther 2,066,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther
Total deferred income tax assets 18,473,000us-gaap_DeferredTaxAssetsGross 23,152,000us-gaap_DeferredTaxAssetsGross
Deferred income tax liabilities:    
Depreciation (1,674,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment (2,136,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Amortization (236,000)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets (236,000)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets
Total deferred income tax liabilities (1,910,000)us-gaap_DeferredIncomeTaxLiabilities (2,372,000)us-gaap_DeferredIncomeTaxLiabilities
Net deferred income tax assets before valuation allowance 16,563,000tasr_DeferredTaxAssetsNetofDeferredTaxLiabilities 20,780,000tasr_DeferredTaxAssetsNetofDeferredTaxLiabilities
Valuation allowance (500,000)us-gaap_DeferredTaxAssetsValuationAllowance 0us-gaap_DeferredTaxAssetsValuationAllowance
Net deferred income tax assets $ 16,063,000us-gaap_DeferredTaxAssetsLiabilitiesNet $ 20,780,000us-gaap_DeferredTaxAssetsLiabilitiesNet