Stock Option Plan - Stock Option Activity Under Stock Option Plan (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Number of Shares
Beginning Balance	46,589	69,391
Granted	13,289	25,912
Exercised	0	0
Cancelled	(26,641)	(48,714)
Ending Balance	33,237	46,589	69,391
Options exercisable, at end of period	23,903
Options available for future grant	142,745
Weighted Average Exercise Price
Beginning Balance	$ 268.5	$ 276
Granted	10.84	73.5
Exercised	0	0
Cancelled	283.09	177
Ending Balance	153.79	$ 268.5	$ 276
Options exercisable, at end of period	$ 224.53
Weighted Average Contractual Term (Years)
Outstanding, period	7 years 1 month 24 days	7 years 7 months 20 days	8 years 8 months 8 days
Options exercisable, at end of period	7 years 4 months 28 days
Aggregate Intrinsic Value
Outstanding, at beginning of period	$ 0	$ 3
Outstanding, at end of period	0	$ 0	$ 3
Options exercisable, at end of period	$ 0