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Certain Balance Sheet Items - Accounts Payable and Accrued Expenses (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Jun. 30, 2023
Mar. 31, 2023
Jul. 31, 2022
Mar. 09, 2021
Accounts Payable and Accrued Expenses [Line Items]          
Common stock, shares, issued (in shares)   268,073,202      
Nonrelated Party          
Accounts Payable and Accrued Expenses [Line Items]          
Trade accounts payable $ 19,862,487 $ 8,670,070      
Accrued compensation 12,574,921 10,001,069      
Accrued litigation settlement 44,000,000 0      
Other accrued expenses 3,249,477 2,594,011      
Total 79,686,885 $ 21,265,150      
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        
Common stock, shares, issued (in shares)     9,121,000