Quarterly report pursuant to Section 13 or 15(d)

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

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Cash, Cash Equivalents and Short-Term Investments (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Cash, cash equivalent and short term investments        
Cash and cash equivalents $ 44,229 $ 76,322 [1] $ 65,078 $ 38,290
Short-term investments 68,148 52,215 [1]    
Cash, cash equivalents and short-term investments 112,377 128,537    
Money market funds        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments 9,855 9,106    
Government-sponsored enterprises securities        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments 4,997 7,872    
Corporate bonds and commercial paper        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments 95,227 108,933    
Cash        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments $ 2,298 $ 2,626    
[1] The balance sheet at December 31, 2018 has been derived from the audited financial statements included in Rigel’s Annual Report on Form 10-K for the year ended December 31, 2018.