Summary of Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2022	Dec. 31, 2021
Equity [Abstract]
Beginning Balance		70,000
Forfeited, cancelled, or expired		(18,000)
Ending Balance		52,000	70,000
Options exercisable at September 30, 2022		50,000
Vested options expired during the period ended September 30, 2022		0
Beginning Balance		$ 62.01
Forfeited, cancelled, or expired		22.82
Ending Balance		74.95	$ 62.01
Options exercisable at September 30, 2022		77.50
Vested options expired during the period ended September 30, 2022		$ 0
Weighted-Average Remaining Contractual Term (Years)
Options outstanding		6 years	7 years 1 month 6 days
Options exercisable		5 years 10 months 24 days
Options outstanding	[1]	$ 0	$ 15
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.