Stockholders' Equity - Summary Information about Stock Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Roll Forward]
Beginning balance (in shares)	131
Granted (in shares)	0
Exercised (in shares)	0
Canceled/forfeited (in shares)	0
Expired (in shares)	(15)
Ending balance (in shares)	116	131
Exercisable (in shares)	116
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average exercise price, beginning balance (in dollars per share)	$ 4.08
Weighted average exercise price, granted (in dollars per share)	0
Weighted average exercise price, exercised (in dollars per share)	0
Weighted average exercise price, canceled/forfeited (in dollars per share)	0
Weighted average exercise price, expired (in dollars per share)	11.81
Weighted average exercise price, ending balance (in dollars per share)	3.07	$ 4.08
Weighted average exercise price, exercisable (in dollars per share)	$ 3.07
Weighted-average remaining contractual term, outstanding	3 years 10 months 24 days	4 years 4 months 24 days
Weighted-average remaining contractual term, exercisable	3 years 10 months 24 days
Aggregate intrinsic value outstanding	$ 192	$ 172
Aggregate intrinsic value exercisable	$ 192

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.