Organization - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash, cash equivalents and restricted cash	$ 1,091	$ 6,062	$ 52,996
Accumulated deficit	$ (920,446)	$ (915,767)
Common stock, shares outstanding	1,601,252	1,601,252
Common Stock [Member]
Common stock, shares outstanding	1,601,252
Common stock reserved for future issuance	142,745