Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 12, 2020	Oct. 31, 2020	Dec. 31, 2020	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Oct. 13, 2020	Jun. 11, 2020
Subsequent Event [Line Items]
Proceeds from stock warrant exercises					$ 88,042	$ 0
Class of warrant or right, outstanding (in shares)								9,166,659
Public Warrants
Subsequent Event [Line Items]
Proceeds from stock warrant exercises				$ 88,000
Class of warrant or right, outstanding (in shares)				9,166,659	9,166,659
Class of warrant or right, redemption price (in dollars per share)				$ 0.01	$ 0.01
Subsequent Event | Public Warrants
Subsequent Event [Line Items]
Class of warrant or right, number of securities called by warrants or rights (in shares)							9,160,776
Proceeds from stock warrant exercises	$ 14,700	$ 17,300
Class of warrant or right, outstanding (in shares)							5,883
Class of warrant or right, redemption price (in dollars per share)							$ 0.01
Subsequent Event | Public Warrants | Forecast [Member]
Subsequent Event [Line Items]
Proceeds from stock warrant exercises			$ 105,300