Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)				1 Months Ended	6 Months Ended
	Feb. 22, 2023	Feb. 21, 2023	Jan. 01, 2023	Sep. 30, 2022	Jun. 30, 2023	Dec. 31, 2022	Aug. 31, 2022	Sep. 17, 2018
Accounting Policies [Line Items]
Date of incorporation					Apr. 06, 2018
Net proceeds from issuance of common stock					$ 9,980,000
Goodwill impairment					0
Total assets					1,308,472,000	$ 1,163,654,000
Total deposits					$ 1,034,842,000	$ 946,772,000
Common Stock, Shares, Outstanding					16,228,440	14,939,640
Common stock, par value					$ 0.01	$ 0.01
Retained earnings					$ 19,039,000	$ 27,100,000
Accrued interest receivable on held-to-maturity debt securities					141,000
Accrued interest receivable on available for sale debt securities					516,000
Allowance on held-to-maturity securities					$ 586,000
Maximum [Member]
Accounting Policies [Line Items]
Offering price per share					$ 7.5
IPO [Member]
Accounting Policies [Line Items]
Shares of common stock issued and sold				5,101,205
Offering price per share				$ 7.5			$ 9.32
Net proceeds from issuance of common stock				$ 34,659,000
Underwriting discounts and commissions				2,487,000
Other offering expenses				$ 1,114,000
Investment Agreement [Member]
Accounting Policies [Line Items]
Shares of common stock issued and sold		1,282,052
Offering price per share		$ 7.8
Underwriting discounts and commissions		$ 0
Common stock, par value		$ 0.01
Gross proceeds from issuance of common stock		$ 10,000,000
Partners Bancorp [Member]
Accounting Policies [Line Items]
Partners merger agreement date	Feb. 22, 2023
Total assets						1,570,000,000
Total loans						1,230,000,000
Total deposits						$ 1,340,000,000
Common Stock, Shares, Outstanding						17,973,724
ASU 2017-04 [Member]
Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date					Jan. 01, 2023
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]					true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]					true
ASU 2022-01 [Member]
Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date					Jan. 01, 2023
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]					true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]					true
ASU 2016-13 [Member]
Accounting Policies [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date					Jan. 01, 2023
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]					true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]					true
ASU 2016-13 [Member] | Cumulative Effect Adjustment [Member]
Accounting Policies [Line Items]
Increase in allowance for credit losses			$ 5,700,000
Retained earnings			(5,400,000)
Allowance for credit losses for unfunded loan commitments			910,000
Allowance on held-to-maturity securities			602,000
PCD assets, allowance for credit loss			$ 308,000
Residential loans [Member]
Accounting Policies [Line Items]
Number of days past due for loans to be declared as deliquent					180 days
Consumer [Member]
Accounting Policies [Line Items]
Number of days past due for loans to be declared as deliquent					120 days
Stonebridge Bank [Member]
Accounting Policies [Line Items]
Business acquistion percentage of voting interests acquired								100.00%
Accrued Interest Receivable and Other Assets [Member]
Accounting Policies [Line Items]
Accrued interest receivable on loans					$ 3,927,000