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Certain Balance Sheet Items - Accounts Payable and Accrued Expenses (Details) - USD ($)
6 Months Ended
Jun. 30, 2022
Jul. 31, 2022
Dec. 31, 2021
Mar. 09, 2021
Accounts Payable and Accrued Expenses [Line Items]        
Trade accounts payable $ 38,235,903   $ 27,424,743  
Accrued compensation 15,142,185   16,112,912  
Accrued litigation settlement 44,000,000   0  
Other accrued expenses 7,637,249   4,106,875  
Total accounts payable and accrued expenses 105,015,337   $ 47,644,530  
McDermid v. Inovio Pharmaceuticals, Inc. and J. Joseph Kim        
Accounts Payable and Accrued Expenses [Line Items]        
Estimate of cash settlement       $ 30,000,000
Estimate of shares settlement       $ 14,000,000
Amount paid to other party $ 252,000      
Subsequent Event | McDermid v. Inovio Pharmaceuticals, Inc. and J. Joseph Kim        
Accounts Payable and Accrued Expenses [Line Items]        
Estimate of cash settlement   $ 30,000,000    
Estimate of shares settlement   $ 14,000,000