Annual report pursuant to Section 13 and 15(d)

DOCUMENT AND ENTITY INFORMATION

v3.19.3.a.u2
DOCUMENT AND ENTITY INFORMATION - USD ($)
12 Months Ended
Dec. 31, 2019
Feb. 20, 2020
Jun. 30, 2019
DOCUMENT AND ENTITY INFORMATION      
Entity Registrant Name RIGEL PHARMACEUTICALS INC    
Entity Central Index Key 0001034842    
Document Type 10-K    
Document Period End Date Dec. 31, 2019    
Amendment Flag false    
Entity Small Business true    
Entity Emerging Growth Company false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Accelerated Filer    
Entity Public Float     $ 437,415,634
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   168,569,525  
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY