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Acquisitions - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended
Dec. 27, 2023
Apr. 18, 2022
Apr. 30, 2022
Mar. 31, 2018
Mar. 31, 2024
Dec. 31, 2022
Oct. 31, 2018
Sep. 30, 2018
Dec. 31, 2017
Discontinued Operations, Disposed of by Sale | Elusys Therapeutics                  
Acquisitions                  
Purchase price $ 2,500,000                
Gain from disposal of discontinued operations $ 1,500,000                
Pelican Therapeutics, Inc.                  
Acquisitions                  
Ownership interest in subsidiary         85.00%   85.00% 80.00%  
Pelican Therapeutics, Inc.                  
Acquisitions                  
Percentage of voting interests acquired in acquisition                 80.00%
Cash consideration       $ 200,000          
Proceeds from milestone payment           $ 0      
Pelican Therapeutics, Inc. | Stockholders                  
Acquisitions                  
Cash consideration       $ 300,000          
Elusys Therapeutics                  
Acquisitions                  
Percentage of earn out payments     10.00%            
Frequency of periodic earn out payment     1 year            
Period of occurrence of earn payment     9 years            
Fair value of the purchase consideration   $ 42,900,000              
Goodwill   $ 3,900,000              
Goodwill deductible for tax purposes   15 years