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Leases - Schedule of Leases (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Assets
Operating lease assets	$ 306		$ 306		$ 792
Total leased assets	306		306		792
Liabilities
Current - Operating	346		346		852
Noncurrent - Operating	0		0		155
Total leased liabilities	346		346		$ 1,007
Lease Cost
Net lease cost	$ 33	$ 83	$ 284	$ 253
Lease Term and Discount Rate
Weighted-average remaining lease term (years)	8 months 12 days		8 months 12 days		2 years 3 months 18 days
Weighted-average discount rate	6.50%		6.50%		6.00%
SG&A and R&D Expenses [Member]
Lease Cost
Operating lease cost	$ 172	191	$ 678	572
Sublease income	(142)	(111)	(404)	(329)
SG&A Expenses [Member]
Lease Cost
Short term lease cost	$ 3	$ 3	$ 10	$ 10

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Amount of lease cost recognized by lessee for lease contract.

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