Stock Option Plan - Stock Option Activity Under Stock Option Plan (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Number of Shares
Beginning Balance	33,237
Granted	196,580
Exercised	0
Cancelled	(7,332)
Ending Balance	222,485	33,237
Options exercisable, at end of period	96,435
Options available for future grant	953,496
Weighted Average Exercise Price
Beginning Balance	$ 153.79
Granted	4.33
Exercised	0
Cancelled	176.07
Ending Balance	23.98	$ 153.79
Options exercisable, at end of period	$ 49.11
Weighted Average Contractual Term (Years)
Outstanding, period	9 years 14 days	7 years 1 month 24 days
Options exercisable, at end of period	8 years 6 months 14 days
Aggregate Intrinsic Value
Outstanding, at beginning of period	$ 0
Outstanding, at end of period	31	$ 0
Options exercisable, at end of period	$ 31