XML 44 R53.htm IDEA: XBRL DOCUMENT v2.4.1.9
Schedule of Net Deferred tax Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosure [Abstract]        
Accrued expenses $ 18us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities $ 46us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities    
Other temporary differences 2us-gaap_DeferredTaxAssetsOther 1us-gaap_DeferredTaxAssetsOther    
Total current deferred tax assets 20us-gaap_DeferredTaxAssetsNetCurrent 47us-gaap_DeferredTaxAssetsNetCurrent    
Noncurrent deferred tax assets:        
Capitalized research and development expenses 19,856us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment 16,676us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment    
Net operating loss carryforwards 4,021us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 3,209us-gaap_DeferredTaxAssetsOperatingLossCarryforwards    
Tax credit carryforwards 5,579us-gaap_DeferredTaxAssetsTaxCreditCarryforwards 3,656us-gaap_DeferredTaxAssetsTaxCreditCarryforwards    
Capitalized legal expenses 790us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLegalSettlements 385us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLegalSettlements    
Stock-based compensation 91us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost 33us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost    
Total noncurrent deferred tax assets 30,337us-gaap_DeferredTaxAssetsNetNoncurrent 23,959us-gaap_DeferredTaxAssetsNetNoncurrent    
Total gross deferred tax assets 30,357us-gaap_DeferredTaxAssetsGross 24,006us-gaap_DeferredTaxAssetsGross    
Valuation allowance (30,357)us-gaap_DeferredTaxAssetsValuationAllowance (24,006)us-gaap_DeferredTaxAssetsValuationAllowance (18,744)us-gaap_DeferredTaxAssetsValuationAllowance (12,748)us-gaap_DeferredTaxAssetsValuationAllowance
Net deferred tax assets $ 0us-gaap_DeferredTaxAssetsNet $ 0us-gaap_DeferredTaxAssetsNet