Series B Convertible Preferred Stock and Stockholders' Equity - Temporary Equity (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($) shares
Series B Convertible Stock
Temporary Equity [Line Items]
Balance at beginning of period (in shares) | shares	0
Balance at beginning of period	$ 0
Issuance of preferred stock (in shares) | shares	150,000
Issuance of preferred stock	$ 150,000
Exchange to Series B preferred stock (in shares) | shares	0
Exchange to Series B preferred stock	$ 0
Issuance-related expenses	$ (11,516)
Additional preferred shares (in shares) | shares	0
Additional preferred shares	$ 2,200
Balance at end of period (in shares) | shares	150,000
Balance at end of period	$ 140,684
Series B-1 Convertible Preferred Stock
Temporary Equity [Line Items]
Balance at beginning of period (in shares) | shares	0
Balance at beginning of period	$ 0
Issuance of preferred stock (in shares) | shares	150,000
Issuance of preferred stock	$ 150,000
Exchange to Series B preferred stock (in shares) | shares	(150,000)
Exchange to Series B preferred stock	$ (150,000)
Issuance-related expenses	$ 0
Additional preferred shares (in shares) | shares	0
Additional preferred shares	$ 0
Balance at end of period (in shares) | shares	0
Balance at end of period	$ 0
Series B-2 Convertible Preferred Stock
Temporary Equity [Line Items]
Balance at beginning of period (in shares) | shares	0
Balance at beginning of period	$ 0
Issuance of preferred stock (in shares) | shares	150,000
Issuance of preferred stock	$ 0
Exchange to Series B preferred stock (in shares) | shares	(150,000)
Exchange to Series B preferred stock	$ 0
Issuance-related expenses	$ 0
Additional preferred shares (in shares) | shares	0
Additional preferred shares	$ 0
Balance at end of period (in shares) | shares	0
Balance at end of period	$ 0