Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Taxes
Company's effective tax rate	0.00%	0.00%	0.00%	0.00%
Income tax benefit	$ 0	$ 0	$ 0	$ 0
Percentage of ineligible annual research and development credit for cash	65.00%	65.00%	65.00%	65.00%