Net Loss per Share - Schedule of Antidilutive Securities Outstanding Excluded from Computation of Diluted Weighted-Average Shares Outstanding (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities outstanding excluded from computation of diluted weighted-average shares outstanding	10,754	46,408	10,754	46,408
Preferred Stock as-Converted
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities outstanding excluded from computation of diluted weighted-average shares outstanding	0	34,442	0	34,442
Stock Options Outstanding
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities outstanding excluded from computation of diluted weighted-average shares outstanding	9,391	9,422	9,391	9,422
Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities outstanding excluded from computation of diluted weighted-average shares outstanding	1,363	0	1,363	0
Warrants to Purchase Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities outstanding excluded from computation of diluted weighted-average shares outstanding	0	364	0	364
Convertible Debt
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities outstanding excluded from computation of diluted weighted-average shares outstanding	0	2,180	0	2,180