Summary of Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2023	Dec. 31, 2022
Equity [Abstract]
Beginning Balance		1,000
Forfeited, cancelled, or expired		0
Ending Balance		1,000	1,000
Options exercisable as of June 30, 2023		1,000
Vested options expired during the period ended June 30, 2023		0
Beginning Balance		$ 7,494.72
Forfeited, cancelled, or expired		23,791.67
Ending Balance		7,419.6	$ 7,494.72
Options exercisable as of June 30, 2023		7,569.48
Vested options expired during the period ended June 30, 2023		$ 0
Weighted-Average Remaining Contractual Term (Years)
Options outstanding		5 years 3 months 18 days	5 years 9 months 18 days
Options exercisable		5 years 2 months 12 days
Options outstanding	[1]	$ 0	$ 0
Options exercisable	[1]	$ 0

[1] The intrinsic value calculation does not include negative values, which can occur when the fair market value on the reporting date is less than the exercise price of the award. (2) Shares rounded to less than 1,000 as adjusted for the 2023 reverse stock split.