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
Mar. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Dec. 31, 2018
Cash, cash equivalent and short term investments        
Cash and cash equivalents $ 45,225 $ 22,521 [1] $ 74,696 $ 76,322
Short-term investments 50,701 75,557 [1]    
Cash, cash equivalents and short-term investments 95,926 98,078    
Money market funds        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments 35,401 7,457    
U.S. treasury bills        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments 9,544 12,539    
Government-sponsored enterprises securities        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments 8,635 19,017    
Corporate bonds and commercial paper        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments 39,215 55,694    
Cash        
Cash, cash equivalent and short term investments        
Cash, cash equivalents and short-term investments $ 3,131 $ 3,371    
[1] The balance sheet at December 31, 2019 has been derived from the audited financial statements included in Rigel’s Annual Report on Form 10-K for the year ended December 31, 2019.