Stock-based Compensation - Summary of Restricted Stock Activity (Detail) - Restricted Stock - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Beginning balance, shares outstanding (in shares)	1,038,006
Number of shares, granted (in shares)	473,162
Number of shares, vested (in shares)	(543,695)
Number of share, forfeitures (in shares)	(14,502)
Ending balance, shares outstanding (in shares)	952,971	1,038,006
Beginning balance, weighted average grant price, outstanding (in dollars per share)	$ 5.80
Weighted average grant price, granted (in dollars per share)	6.05	$ 5.38	$ 5.40
Weighted average grant price, vested (in dollars per share)	6.13
Weighted average grant price, forfeitures (in dollars per share)	5.58
Ending balance, weighted average grant price, outstanding (in dollars per share)	$ 5.74	$ 5.80
Fair value of vested restricted stock	$ 3,070	$ 2,852	$ 925
Per share weighted average fair value (in dollars per share)	$ 6.05	$ 5.38	$ 5.40
Compensation expense recognized for restricted stock grants	$ 3,406	$ 3,247	$ 2,121
Unrecognized compensation expense related to unvested shares	$ 3,939
Expected recognition period	1 year 8 months 12 days

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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