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Microsoft Collaboration Agreement - Additional Information (Details) - USD ($)
1 Months Ended
Dec. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
preferred stock investment  
Microsoft Collaboration Agreement      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Minimum service consumption requirement amount $ 12,000,000.0    
Minimum service consumption requirement term 7 years    
Microsoft Collaboration Agreement | Series F-1 Convertible Preferred Stock      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
preferred stock investment $ 45,000,000.0