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Fair Value Measurements - Additional Information (Details) - USD ($)
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Mar. 24, 2020
Dec. 31, 2019
Fair Value Disclosures [Abstract]        
Financial instruments $ 0      
Transfers within hierarchy $ 0 $ 0    
Preferred stock tranche rights liability     $ 0 $ 5,400,000
Anti-dilution warrants       $ 0