Leases - Schedule of Lease Cost Recognized in Consolidated Statement of Operations and Other Lease Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Leases [Abstract]
Operating lease cost	$ 95	$ 144	$ 366	$ 431
Finance lease cost:
Amortization of right-of-use assets	0	0	0	0
Interest on lease liabilities	4	17	23	58
Variable and short-term lease cost	3	5	22	14
Total operating lease cost	$ 102	$ 166	$ 411	$ 503
Other information:
Weighted-average remaining lease term - operating leases	2 years 2 months 12 days	2 years 9 months 18 days	2 years 2 months 12 days	2 years 9 months 18 days
Weighted-average remaining lease term - finance leases	2 months 12 days	1 year 2 months 12 days	2 months 12 days	1 year 2 months 12 days
Weighted-average discount rate - operating leases	7.50%	6.90%	7.50%	6.90%
Weighted-average discount rate - finance leases	14.10%	14.10%	14.10%	14.10%
Cash paid for operating leases	$ 95	$ 145	$ 366	$ 421
Cash paid for finance leases	$ 115	$ 115	$ 344	$ 344

Finance lease cost.

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- Definition

Long term operating lease cost.

+ References

No definition available.

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- Definition

Variable and short-term lease cost.

+ References

No definition available.

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- Definition

Amount of interest expense on finance lease liability.

+ References

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Amount of cash outflow for principal payment on finance lease.

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- Definition

Amount of amortization expense attributable to right-of-use asset from finance lease.

+ References

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- Definition

Weighted average discount rate for finance lease calculated at point in time.

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- Definition

Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

+ References

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- Definition

Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

+ References

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-Topic 842
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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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