Stock Warrants and Earnouts - Summary of Assumed Public Warrants (Detail)	Apr. 30, 2021 shares
Assumed Common Stock Warrants Or Right [Line Items]
Outstanding as of January 31, 2021	38,761,031	[1]
Common Stock Warrants as Part of the Merger	16,992,130	[1]
Warrants Exercised	(11,858,074)	[1]
Exercisable as of Outstanding as of April 30, 2021	43,895,087	[1]
Legacy Common and Preferred Stock Warrants [Member]
Assumed Common Stock Warrants Or Right [Line Items]
Outstanding as of January 31, 2021	38,761,031	[1]
Warrants Exercised	(1,097,305)	[1]
Exercisable as of Outstanding as of April 30, 2021	37,663,726	[1]
Private Placement Warrants [Member]
Assumed Common Stock Warrants Or Right [Line Items]
Common Stock Warrants as Part of the Merger	6,521,568
Warrants Exercised	(4,347,712)
Exercisable as of Outstanding as of April 30, 2021	2,173,856
Public Warrants [Member]
Assumed Common Stock Warrants Or Right [Line Items]
Common Stock Warrants as Part of the Merger	10,470,562
Warrants Exercised	(6,413,057)
Exercisable as of Outstanding as of April 30, 2021	4,057,505

[1] The shares (and the warrants’ exercise prices) subject to the Company’s Legacy common and preferred stock warrants were restated to reflect the exchange ratio of approximately 0.9966 established in the Merger Agreement as discussed in Note 3.