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Consolidated Statements of Comprehensive Loss - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Comprehensive Income [Abstract]      
Net loss $ (303,658,710) $ (167,474,914) $ (120,551,777)
Other comprehensive income (loss):      
Foreign currency translation (30,134) 27,205 0
Unrealized gain (loss) on short-term investments, net of tax 4,048 (755,963) 1,001,475
Comprehensive loss (303,684,796) (168,203,672) (119,550,302)
Comprehensive loss attributable to non-controlling interest 0 1,063,757 1,192,558
Comprehensive loss attributable to Inovio Pharmaceuticals, Inc. $ (303,684,796) $ (167,139,915) $ (118,357,744)