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Certain Balance Sheet Items - Schedule of Accounts Payable and Accrued Expenses (Details) - USD ($)
 1 Months Ended 12 Months Ended
Jul. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Mar. 31, 2023
Jan. 31, 2023
Jul. 31, 2022
Accounts Payable and Accrued Expenses [Line Items]            
Unused grant funding   $ 4,300,000        
Nonrelated Party            
Accounts Payable and Accrued Expenses [Line Items]            
Trade accounts payable   3,577,826 $ 19,862,487      
Accrued compensation   9,837,104 12,574,921      
Accrued litigation settlement   0 44,000,000      
Other accrued expenses   6,432,814 3,249,477      
Accounts payable and accrued liabilities   $ 19,847,744 79,686,885      
McDermid v. Inovio Pharmaceuticals, Inc. and J. Joseph Kim            
Accounts Payable and Accrued Expenses [Line Items]            
Estimate of cash settlement         $ 30,000,000 $ 30,000,000
Estimate of shares settlement         $ 14,000,000 $ 14,000,000
Amount paid to other party     $ 252,000      
Shares issued in settlement (in shares)       760,083    
Behesti v. Kim, et al.            
Accounts Payable and Accrued Expenses [Line Items]            
Damages paid $ 1,200,000