Convertible Preferred Stock - Additional Information (Details) $ / shares in Units, $ in Thousands			1 Months Ended		12 Months Ended
	Oct. 27, 2020 shares	Oct. 19, 2020	Mar. 31, 2019 USD ($) $ / shares shares	Feb. 28, 2019 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2020 $ / shares shares
Class Of Stock [Line Items]
Convertible preferred stock, issued					118,766,273	0
Convertible preferred stock, par value | $ / shares					$ 0.001	$ 0.001
Proceeds from issuance of series H preferred stock | $					$ 10,000
Reverse stock split ratio		0.1684664
Number of preferred stock converted into common stock	20,090,745
Convertible preferred stock, outstanding					118,766,273	0
Series H Convertible Preferred Stock
Class Of Stock [Line Items]
Convertible preferred stock, issued			8,695,621	8,695,621
Convertible preferred stock, par value | $ / shares			$ 1.15	$ 1.15
Proceeds from issuance of series H preferred stock | $			$ 10,000	$ 10,000
Reverse stock split ratio	0.1684664
Series A-1 Preferred Stock
Class Of Stock [Line Items]
Reverse stock split ratio	0.1684664
Series A2 Preferred Stock
Class Of Stock [Line Items]
Reverse stock split ratio	0.1684664
Series A3 Preferred Stock
Class Of Stock [Line Items]
Reverse stock split ratio	0.1684664
Series B Preferred Stock
Class Of Stock [Line Items]
Reverse stock split ratio	0.1684664
Series C Preferred Stock
Class Of Stock [Line Items]
Reverse stock split ratio	0.1684664
Series D Preferred Stock
Class Of Stock [Line Items]
Reverse stock split ratio	0.1684664
Series E Preferred Stock
Class Of Stock [Line Items]
Reverse stock split ratio	0.1684664
Series F Preferred Stock
Class Of Stock [Line Items]
Reverse stock split ratio	0.1684664
Series G Preferred Stock
Class Of Stock [Line Items]
Reverse stock split ratio	0.1684664
Series B1 Convertible Preferred Stock
Class Of Stock [Line Items]
Reverse stock split ratio	0.196