Fair Value Measurements - Summary of Assets and Liabilities at Carrying Value and Estimated Fair Value on a Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financial Assets:
Cash and due from banks	$ 9,976	$ 6,096	[1]
Federal funds sold	1,319	1,359	[1]
Certificates of deposit	2,754	2,754	[1]
Restricted securities	5,752	5,706	[1]
Loans receivable, net	960,023	916,628	[1]
Loans held for sale	747	1,231	[1]
Accrued interest receivable	3,139	3,035	[1]
Financial Liabilities:
Savings and interest-bearing demand deposits	394,637	382,607	[1]
Time deposits	433,393	389,900	[1]
Securities sold under repurchase agreements	3,284	6,525	[1]
FHLB advances	45,000	45,000	[1]
Subordinated notes, net	31,029	31,001	[1]
Fair Value, Inputs, Level 1
Financial Assets:
Cash and due from banks	9,976	6,096
Interest-earning deposits	44,711	34,358
Federal funds sold	1,319	1,359
Financial Liabilities:
Noninterest-bearing demand deposits	136,437	137,933
Savings and interest-bearing demand deposits	394,637	382,607
Securities sold under repurchase agreements	3,284	6,525
Fair Value, Inputs, Level 2
Financial Assets:
Certificates of deposit	2,754	2,754
Loans held for sale	747	1,231
Accrued interest receivable	3,139	3,035
Financial Liabilities:
FHLB advances	44,762	44,936
Fair Value, Inputs, Level 3
Financial Assets:
Restricted securities	5,752	5,706
Loans receivable, net	936,774	910,678
Financial Liabilities:
Time deposits	436,486	392,562
Subordinated notes, net	31,756	32,552
Carrying Value
Financial Assets:
Cash and due from banks	9,976	6,096
Interest-earning deposits	44,711	34,358
Federal funds sold	1,319	1,359
Certificates of deposit	2,754	2,754
Restricted securities	5,752	5,706
Loans receivable, net	960,023	916,628
Loans held for sale	747	1,231
Accrued interest receivable	3,139	3,035
Financial Liabilities:
Noninterest-bearing demand deposits	136,437	137,933
Savings and interest-bearing demand deposits	394,637	382,607
Time deposits	433,393	389,900
Securities sold under repurchase agreements	3,284	6,525
FHLB advances	45,000	45,000
Subordinated notes, net	31,029	31,001
Fair Value
Financial Assets:
Cash and due from banks	9,976	6,096
Interest-earning deposits	44,711	34,358
Federal funds sold	1,319	1,359
Certificates of deposit	2,754	2,754
Restricted securities	5,752	5,706
Loans receivable, net	936,774	910,678
Loans held for sale	747	1,231
Accrued interest receivable	3,139	3,035
Financial Liabilities:
Noninterest-bearing demand deposits	136,437	137,933
Savings and interest-bearing demand deposits	394,637	382,607
Time deposits	436,486	392,562
Securities sold under repurchase agreements	3,284	6,525
FHLB advances	44,762	44,936
Subordinated notes, net	$ 31,756	$ 32,552

[1] Derived from audited December 31, 2019 Consolidated Financial Statements.