Equity Incentive Plan - Summary of Company's Outstanding Restricted Stock (Detail) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) $ / shares shares
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted	88,577
Expected future remaining compensation expense | $	$ 1,675
Expected future compensation expense, restricted shares remaining vesting period	2 years 10 months 13 days
Restricted Shares Awarded on March 14, 2019 [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted	1,924
Date of Award	Mar. 14, 2019
Expected future remaining compensation expense | $	$ 28
Expected future compensation expense, restricted shares remaining vesting period	9 months
Restricted Shares Awarded on March 14, 2020 [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted	4,265
Date of Award	Mar. 14, 2020
Expected future remaining compensation expense | $	$ 72
Expected future compensation expense, restricted shares remaining vesting period	1 year 9 months
Restricted Shares Awarded on March 3, 2021 [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted	7,776
Date of Award	Mar. 03, 2021
Expected future remaining compensation expense | $	$ 125
Expected future compensation expense, restricted shares remaining vesting period	2 years 9 months
Restricted Shares Awarded on March 3, 2021 [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted	6,852
Date of Award	Mar. 03, 2021
Expected future remaining compensation expense | $	$ 98
Expected future compensation expense, restricted shares remaining vesting period	9 months
Restricted Shares Awarded on March 3, 2022 [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted	9,554
Date of Award	Mar. 03, 2022
Expected future remaining compensation expense | $	$ 204
Expected future compensation expense, restricted shares remaining vesting period	3 years 9 months
Restricted Shares Awarded on March 3, 2022 [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted	11,357
Date of Award	Mar. 03, 2022
Expected future remaining compensation expense | $	$ 223
Expected future compensation expense, restricted shares remaining vesting period	1 year 9 months
Restricted Shares Awarded on March 14, 2023 [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted	17,103
Date of Award	Mar. 14, 2023
Expected future remaining compensation expense | $	$ 337
Expected future compensation expense, restricted shares remaining vesting period	4 years 9 months
Restricted Shares Awarded on March 14, 2023 [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Granted	29,746
Date of Award	Mar. 14, 2023
Expected future remaining compensation expense | $	$ 588
Expected future compensation expense, restricted shares remaining vesting period	2 years 9 months
Restricted Stock [Member]
Schedule Of Nonvested Stock Option Activity [Line Items]
Number of Restricted Shares, Nonvested at beginning of period	70,475
Number of Restricted Shares, Granted	47,536
Number of Restricted Shares, Vested	(27,694)
Number of Restricted Shares, Forfeited	(1,740)
Number of Restricted Shares, Nonvested at end of period	88,577
Weighted Average Grant Date Fair Value, Nonvested at beginning of period | $ / shares	$ 21.88
Weighted Average Grant Date Fair Value, Granted | $ / shares	21.85
Weighted Average Grant Date Fair Value, Vested | $ / shares	21.52
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	21.74
Weighted Average Grant Date Fair Value, Nonvested at end of period | $ / shares	$ 21.98