Net Loss per Share - Schedule of Potentially Dilutive Securities not Included in Calculation of Dilutive Net Loss per Share (Detail) - shares	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in calculation of dilutive net loss per share (in shares)	6,310,753	1,353,581	903,141
Class B Common Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in calculation of dilutive net loss per share (in shares)	241	577,349	577,349
Common stock options granted under the Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in calculation of dilutive net loss per share (in shares)	1,017,620	705,593	249,247
Common stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities not included in calculation of dilutive net loss per share (in shares)	5,292,892	70,639	76,545