Summary of Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2022	Dec. 31, 2021
Equity [Abstract]
Beginning Balance		70,000
Forfeited, cancelled, or expired		(2,000)
Ending Balance		68,000	70,000
Options exercisable at March 31, 2022		65,000
Vested options expired during the period ended March 31, 2022		0
Beginning Balance		$ 62.00
Forfeited, cancelled, or expired		78.00
Ending Balance		61.75	$ 62.00
Options exercisable at March 31, 2022		63.75
Vested options expired during the period ended March 31, 2022		$ 0
Weighted-Average Remaining Contractual Term (Years)
Options outstanding		6 years 9 months 18 days	7 years 1 month 6 days
Options exercisable		6 years 8 months 12 days
Options outstanding	[1]	$ 1	$ 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.