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Co-Development Agreement with SFJ Pharmaceuticals and Development Derivative Liability (Tables)
9 Months Ended
Sep. 30, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Liabilities at Fair Value The following table presents the changes in the development derivative liability for the three and nine months ended September 30, 2021:
Three Months Ended September 30, 2021Nine Months Ended September 30, 2021
Fair value at beginning of period$11,607 $— 
Non-cash research and development expense5,702 11,497 
Cash receipts from SFJ750 2,250 
Change in the fair value of development derivative liability3,328 7,640 
Fair value at end of period$21,387 $21,387