Quarterly report pursuant to Section 13 or 15(d)

Cash, Cash Equivalents and Short-Term Investments (Details 3)

v2.4.1.9
Cash, Cash Equivalents and Short-Term Investments (Details 3) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Years to Maturity  
Within One Year $ 130,034us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue
After One Year Through Two Years 3,000rigl_CashEquivalentsAndAvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoFairValue
U S Government Sponsored Enterprises Debt Securities  
Years to Maturity  
Within One Year 39,129us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue
/ us-gaap_InvestmentTypeAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
After One Year Through Two Years 3,000rigl_CashEquivalentsAndAvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoFairValue
/ us-gaap_InvestmentTypeAxis
= us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Corporate Bond Securities And Commercial Paper  
Years to Maturity  
Within One Year $ 90,905us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue
/ us-gaap_InvestmentTypeAxis
= rigl_CorporateBondSecuritiesAndCommercialPaperMember