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Description of Business, Basis of Presentation, and Operating Segment (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Jan. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
segment
product
Dec. 31, 2020
USD ($)
Subsidiary, Sale of Stock [Line Items]      
Number of late stage development drugs | product   2  
Cash, cash equivalents, and short-term investments   $ 100,647 $ 180,025
Number of reportable operating segment | segment   1  
Hanmi | Subsequent Event      
Subsidiary, Sale of Stock [Line Items]      
Equity financing received $ 20,000