Stockholders' Equity (Deficit) - Schedule of options (Detail) - Options	12 Months Ended
	Dec. 31, 2024 $ / shares shares	Dec. 31, 2023 $ / shares shares	Dec. 31, 2022 $ / shares shares
Number
Beginning balance (in shares) | shares	8,243,437	6,425,000
Granted (in shares) | shares	1,900,000	1,932,500
Exercised (in shares) | shares	0	0
Forfeited (in shares) | shares	(628,437)	(114,063)
Ending balance (in shares) | shares	9,515,000	8,243,437	6,425,000
Vested and expected to vest (in shares) | shares	6,367,785
Weighted Average Exercise Price
Beginning balance (in usd per share)	$ 2.38	$ 2.69
Granted	0.22	1.48
Exercised (in usd per share)	0	0
Forfeited (in usd per share)	1.55	2.00
Ending balance (in usd per share)	2.03	$ 2.38	$ 2.69
Vested and expected to vest (in usd per share)	$ 2.22
Weighted-Average Remaining Contractual Term (in Years)
Weighted Average Remaining Contractual Life (Years)	3 years 10 months 20 days	4 years 9 months 3 days	6 years 2 months 15 days
Weighted-average remaining contractual life, granted (in Years)	6 years 5 months 26 days	6 years 2 months 8 days
Weighted average remaining contractual life, vested and exercisable (in Years)	3 years 9 months 21 days
Weighted-Average Fair Value [Abstract]
Beginning balance weighted-average fair value (in usd per share)	$ 3.55	$ 4.26
Options, weighted average grant date fair value (in usd per share)	0.19	1.10	$ 3.34
Ending balance, weighted-average fair value (in usd per share)	3.12	$ 3.55	$ 4.26
Vested and expected to vest, exercisable, weighted average grant date fair value (in usd per share)	$ 2.77