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STOCKHOLDERS' EQUITY (Details 2) (USD $)
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12 Months Ended |
1 Months Ended |
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Dec. 31, 2014
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Mar. 31, 2009
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Dec. 31, 2014
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May 31, 2001
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Oct. 31, 2002
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Jul. 31, 2006
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| Warrants |
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| Fair value of warrants used to determine loss on sublease |
$ 265,000rigl_FairValueOfWarrantIncludedInLossOnSublease
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| Warrants Issued In May2001 [Member] |
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| Warrants |
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| Number of shares of common stock under warrants issued |
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16,666us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInMay2001Member
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| Exercise price of warrant (in dollars per share) |
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$ 80.21us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInMay2001Member
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| Premium percentage |
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15.00%rigl_ClassOfWarrantOrRightPremiumPercentage
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInMay2001Member
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| Fair market value of warrant |
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683,000rigl_WarrantsFairValueDisclosure
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInMay2001Member
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| Remaining balance of warrants to be amortized into expense |
86,000us-gaap_WarrantsAndRightsOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInMay2001Member
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86,000us-gaap_WarrantsAndRightsOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInMay2001Member
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| Warrants Issued In October2002 [Member] |
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| Warrants |
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| Number of shares of common stock under warrants issued |
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55,555us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInOctober2002Member
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| Exercise price of warrant (in dollars per share) |
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$ 17.73us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInOctober2002Member
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| Fair market value of warrant |
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565,000rigl_WarrantsFairValueDisclosure
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInOctober2002Member
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| Remaining balance of warrants to be amortized into expense |
71,000us-gaap_WarrantsAndRightsOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInOctober2002Member
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71,000us-gaap_WarrantsAndRightsOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInOctober2002Member
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| Warrants Issued In July2006 [Member] |
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| Warrants |
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| Number of shares of common stock under warrants issued |
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100,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInJuly2006Member
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| Exercise price of warrant (in dollars per share) |
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$ 10.57us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInJuly2006Member
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| Fair market value of warrant |
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801,000rigl_WarrantsFairValueDisclosure
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInJuly2006Member
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| Remaining balance of warrants to be amortized into expense |
131,000us-gaap_WarrantsAndRightsOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInJuly2006Member
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131,000us-gaap_WarrantsAndRightsOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInJuly2006Member
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| Warrants Issued In March2009 [Member] |
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| Warrants |
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| Number of shares of common stock under warrants issued |
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200,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInMarch2009Member
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| Exercise price of warrant (in dollars per share) |
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$ 6.61us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInMarch2009Member
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| Remaining balance of warrants to be amortized into expense |
132,000us-gaap_WarrantsAndRightsOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInMarch2009Member
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132,000us-gaap_WarrantsAndRightsOutstanding
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInMarch2009Member
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| Cancellation of warrant (in shares) |
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100,000rigl_WarrantsAndRightsCancellationOfWarrantNumber
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInMarch2009Member
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| Incremental fair market value of new warrant |
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616,000us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInMarch2009Member
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| Warrants Issued In December 2014 Member |
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| Warrants |
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| Fair value of warrants used to determine loss on sublease |
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$ 265,000rigl_FairValueOfWarrantIncludedInLossOnSublease
/ us-gaap_ClassOfWarrantOrRightAxis
= rigl_WarrantsIssuedInDecember2014Member
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