Description of Business - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			69 Months Ended
	Jul. 24, 2023	Jul. 15, 2022	Jun. 30, 2023	Dec. 31, 2022
Subsidiary, Sale of Stock [Line Items]
Accumulated deficit			$ 1,123,884	$ 1,032,223
Funds raised			$ 1,062,100
Subsequent Event
Subsidiary, Sale of Stock [Line Items]
Number of warrants	32,467,360
Exercise price of warrants (in dollars per share)	$ 2.04
Warrant term	5 years
Proceeds from issuance of private placement	$ 212,100
Payments of stock issuance costs	$ 10,700
Private Placement
Subsidiary, Sale of Stock [Line Items]
Private placement, number of shares		16,649,365
Offering price (in dollars per share)		$ 7.21
Private Placement | Subsequent Event
Subsidiary, Sale of Stock [Line Items]
Private placement, number of shares	129,869,440
Offering price (in dollars per share)	$ 1.63125
Private placement with officer, director, employee, or consultant | Subsequent Event
Subsidiary, Sale of Stock [Line Items]
Offering price (in dollars per share)	$ 1.85125