Fair Value of Financial Instruments - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financial Assets:
Cash and cash equivalents	$ 87,983	$ 86,036
Loans held for sale	44,947	2,100
Loans receivable, net	1,073,447	1,009,490
Accrued interest receivable	4,968	3,166
Financial Liabilities:
Deposit	1,170,846	1,021,571
Accrued interest payable	1,355	2,686
Carrying Amount
Financial Assets:
Cash and cash equivalents	87,983	86,036
Loans held for sale	41,430	2,100
Loans receivable, net	1,058,626	980,088
Accrued interest receivable	4,968	3,166
Other investments:
FHLB and PCBB stock	6,233	5,548
Financial Liabilities:
Deposit	1,170,164	1,020,711
Accrued interest payable	1,355	2,686
Level 1
Financial Assets:
Cash and cash equivalents	87,983	86,036
Accrued interest receivable	8	41
Level 2
Financial Assets:
Loans held for sale	44,947	2,100
Accrued interest receivable	270	243
Financial Liabilities:
Deposit	1,170,846	1,021,571
Accrued interest payable	1,355	2,686
Level 3
Financial Assets:
Loans receivable, net	1,073,447	1,009,490
Accrued interest receivable	$ 4,690	$ 2,882