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Commitments (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
License Agreement, Upfront Payments        
Commitments        
Research and development expense $ 0 $ 0 $ 0 $ 1,500,000
License Agreement, Milestone Payments        
Commitments        
Research and development expense $ 0 $ 0 $ 0 $ 0