Annual report pursuant to Section 13 and 15(d)

INCOME TAXES (Details)

v2.4.1.9
INCOME TAXES (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Deferred tax assets      
Net operating loss carryforwards $ 268,400us-gaap_DeferredTaxAssetsOperatingLossCarryforwards $ 236,737us-gaap_DeferredTaxAssetsOperatingLossCarryforwards  
Research and development credits 31,735us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch 28,869us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch  
Capitalized research and development expenses 20,312rigl_DeferredTaxAssetsCapitalizedResearchAndDevelopmentCosts 499rigl_DeferredTaxAssetsCapitalizedResearchAndDevelopmentCosts  
Deferred compensation 28,408us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation 24,538us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation  
Other, net 7,876us-gaap_DeferredTaxAssetsOther 3,466us-gaap_DeferredTaxAssetsOther  
Total deferred tax assets 356,731us-gaap_DeferredTaxAssetsGross 294,109us-gaap_DeferredTaxAssetsGross  
Valuation allowance $ (356,731)us-gaap_DeferredTaxAssetsValuationAllowance $ (294,109)us-gaap_DeferredTaxAssetsValuationAllowance  
Reconciliation of the statutory federal income tax rate to the effective tax rate      
Federal statutory tax rate (as a percent) (34.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate (34.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate (34.00%)us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Valuation allowance (as a percent) 32.30%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance 37.90%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance 47.50%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
True up of prior year net operating loss (as a percent) 0.00%rigl_EffectiveIncomeTaxRateReconciliationTrueUpOfPriorYearNetOperatingLoss 0.00%rigl_EffectiveIncomeTaxRateReconciliationTrueUpOfPriorYearNetOperatingLoss (11.40%)rigl_EffectiveIncomeTaxRateReconciliationTrueUpOfPriorYearNetOperatingLoss
Other, net (as a percent) 1.70%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (3.90%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (2.10%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective tax rate (as a percent) 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 0.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations