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Collaborative Agreements (Details) - USD ($)
 1 Months Ended 3 Months Ended
Apr. 30, 2020
Jan. 31, 2020
Aug. 30, 2019
Oct. 31, 2018
Apr. 30, 2018
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                
Revenue from related parties           $ 0 $ 114,943  
Advaccine | Collaborative Arrangement, Product                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                
Upfront payment received           0 1,200,000  
ApolloBio | Collaborative Arrangement, Product                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                
Additional revenue to be achieved           $ 20,000,000    
Royalty period (in years)           10 years    
Revenue from related parties           $ 0 0  
Coalition for Epidemic Preparedness Innovations | Collaborative Arrangement, Product                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                
Collaborative agreement, funding to be received $ 6,900,000              
Coalition for Epidemic Preparedness Innovations | Collaborative Arrangement, Product | Lassa Fever and MERS Vaccine                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                
Collaborative agreement, funding to be received         $ 56,000,000      
Collaborative agreement, period to receive funding for research and development (in years)         5 years      
Collaborative agreement, funding received           0 1,600,000  
Accrued liabilities           2,200,000   $ 2,200,000
Coalition for Epidemic Preparedness Innovations | Collaborative Arrangement, Product | INO-4800                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                
Collaborative agreement, funding to be received 1,300,000 $ 9,000,000            
Collaborative agreement, funding received           0 53,000  
Coalition for Epidemic Preparedness Innovations | Collaborative Arrangement, Product | CELLECTRA 3PSP Proprietary Smart Device                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                
Collaborative agreement, funding to be received $ 5,000,000              
Bill and Melinda Gates Foundation | Collaborative Arrangement, Product | DNA-Encoded Monoclonal Antibody Technology                
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]                
Collaborative agreement, funding received     $ 1,100,000 $ 2,200,000   39,000 $ 59,000  
Accrued liabilities           $ 49,000