Stock-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Roll Forward
Number of Options, Outstanding, Beginning balance	1,862,000
Number of Options, Granted	22,000	22,000
Number of Options, Exercised	(30,000)
Number of Options, Forfeited	(76,000)
Number of Options, Outstanding, Ending balance	1,778,000	1,862,000
Number of Options, Vested and expected to vest	1,778,000
Number of Options, Exercisable	1,767,000
Weighted-Average Exercise Price, Outstanding, Beginning balance	$ 11.97
Weighted-Average Exercise Price, Granted	6.41
Weighted-Average Exercise Price, Exercised	7.95
Weighted-Average Exercise Price, Forfeited	20.94
Weighted-Average Exercise Price, Outstanding, Ending balance	11.46	$ 11.97
Weighted-Average Exercise Price, Vested and expected to vest	11.46
Weighted-Average Exercise Price, Exercisable	$ 11.53
Weighted-Average Remaining Contractual Term	5 years 3 months 25 days	6 years 14 days
Weighted-Average Remaining Contractual Term, Vested and expected to vest	5 years 3 months 25 days
Weighted-Average Remaining Contractual Term, Exercisable	5 years 3 months 18 days
Aggregate Intrinsic Value, Outstanding	$ 148	$ 1,254
Aggregate Intrinsic Value, Vested and expected to vest	148
Aggregate Intrinsic Value, Exercisable	$ 148