Annual report pursuant to Section 13 and 15(d)

STOCK-BASED COMPENSATION (Details 2)

v2.4.1.9
STOCK-BASED COMPENSATION (Details 2)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Employee Stock Option [Member]      
STOCK-BASED COMPENSATION      
Expiration period 10 years    
Number of shares of common stock authorized 24,566,744us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember 		   
Options exercised during the period (in shares) 11,219us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember 		  254,149us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Equity Incentive Plan2011 [Member] | Employee Stock Option [Member]      
STOCK-BASED COMPENSATION      
Additional shares authorized for grant 7,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2011Member 		600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2011Member 		 
Reduction in number of shares available for issuance subject to stock option or stock appreciation right 1rigl_ShareBasedCompensationArrangementByShareBasedPaymentAwardReductionInNumberOfSharesAvailableForIssuanceSubjectToStockOptionOrStockAppreciationRight
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2011Member 		1rigl_ShareBasedCompensationArrangementByShareBasedPaymentAwardReductionInNumberOfSharesAvailableForIssuanceSubjectToStockOptionOrStockAppreciationRight
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2011Member 		 
Strike price as a percentage of fair value of common stock   100.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2011Member 		 
Reduction in number of shares available for issuance subject to any other type of award other than stock option or stock appreciation right 1.64rigl_ShareBasedCompensationArrangementByShareBasedPaymentAwardReductionInNumberOfSharesAvailableForIssuanceSubjectToAnyOtherTypeOfAwardOtherThanStockOptionOrStockAppreciationRight
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2011Member 		1.4rigl_ShareBasedCompensationArrangementByShareBasedPaymentAwardReductionInNumberOfSharesAvailableForIssuanceSubjectToAnyOtherTypeOfAwardOtherThanStockOptionOrStockAppreciationRight
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2011Member 		1.7rigl_ShareBasedCompensationArrangementByShareBasedPaymentAwardReductionInNumberOfSharesAvailableForIssuanceSubjectToAnyOtherTypeOfAwardOtherThanStockOptionOrStockAppreciationRight
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2011Member
Number of shares of common stock authorized 11,078,887us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2011Member 		   
Options exercised during the period (in shares) 11,219us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2011Member 		   
Equity Incentive Plan2011 [Member] | Employee Stock Option [Member] | Minimum [Member]      
STOCK-BASED COMPENSATION      
Vesting period 0 years    
Equity Incentive Plan2011 [Member] | Employee Stock Option [Member] | Maximum [Member]      
STOCK-BASED COMPENSATION      
Expiration period 10 years    
Vesting period 5 years    
Equity Incentive Plan2000 [Member] | Employee Stock Option [Member]      
STOCK-BASED COMPENSATION      
Additional shares authorized for grant 675,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2000Member 		   
Reduction in number of shares available for issuance subject to stock option or stock appreciation right 1rigl_ShareBasedCompensationArrangementByShareBasedPaymentAwardReductionInNumberOfSharesAvailableForIssuanceSubjectToStockOptionOrStockAppreciationRight
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2000Member 		1rigl_ShareBasedCompensationArrangementByShareBasedPaymentAwardReductionInNumberOfSharesAvailableForIssuanceSubjectToStockOptionOrStockAppreciationRight
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2000Member 		 
Strike price as a percentage of fair value of common stock   100.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2000Member 		 
Reduction in number of shares available for issuance subject to any other type of award other than stock option or stock appreciation right 1.64rigl_ShareBasedCompensationArrangementByShareBasedPaymentAwardReductionInNumberOfSharesAvailableForIssuanceSubjectToAnyOtherTypeOfAwardOtherThanStockOptionOrStockAppreciationRight
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2000Member 		1.4rigl_ShareBasedCompensationArrangementByShareBasedPaymentAwardReductionInNumberOfSharesAvailableForIssuanceSubjectToAnyOtherTypeOfAwardOtherThanStockOptionOrStockAppreciationRight
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2000Member 		1.7rigl_ShareBasedCompensationArrangementByShareBasedPaymentAwardReductionInNumberOfSharesAvailableForIssuanceSubjectToAnyOtherTypeOfAwardOtherThanStockOptionOrStockAppreciationRight
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2000Member
Number of shares of common stock authorized 12,299,675us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2000Member 		   
Options exercised during the period (in shares) 0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2000Member 		   
Equity Incentive Plan2000 [Member] | Employee Stock Option [Member] | Minimum [Member]      
STOCK-BASED COMPENSATION      
Vesting period 0 years    
Equity Incentive Plan2000 [Member] | Employee Stock Option [Member] | Maximum [Member]      
STOCK-BASED COMPENSATION      
Vesting period 5 years    
Equity Incentive Plan2000 [Member] | Performance Shares [Member]      
STOCK-BASED COMPENSATION      
Number of shares of common stock authorized   1,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2000Member 		166,666us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_PlanNameAxis
= rigl_EquityIncentivePlan2000Member
Non Employee Directors Stock Option Plan2000 [Member] | Employee Stock Option [Member]      
STOCK-BASED COMPENSATION      
Additional shares authorized for grant 100,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_NonEmployeeDirectorsStockOptionPlan2000Member 		   
Number of shares of common stock authorized 1,235,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_NonEmployeeDirectorsStockOptionPlan2000Member 		   
Number of shares of common stock authorized 1,188,182us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_NonEmployeeDirectorsStockOptionPlan2000Member 		   
Options exercised during the period (in shares) 0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= rigl_NonEmployeeDirectorsStockOptionPlan2000Member 		   
Non Employee Directors Stock Option Plan2000 [Member] | Employee Stock Option [Member] | Maximum [Member]      
STOCK-BASED COMPENSATION      
Expiration period 10 years