Fair Value Measurements and Disclosures - Schedule of Carrying Amounts and Estimated Fair Values of Company's Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financial assets:
Investment securities available-for-sale	$ 24,021	$ 24,005
Carrying Amount
Financial assets:
Cash and cash equivalents	101,398	178,253
Investment securities available-for-sale	24,021	24,005
Other investments	2,101	1,596
Loans, net	619,224	592,254
Bank owned life insurance	15,100	15,311
Financial liabilities:
Deposits	635,115	640,165
FHLB advances	39,084	19,117
PPPLF borrowings		100,813
Other borrowings		5,000
Estimated Fair Value
Financial assets:
Cash and cash equivalents	101,398	178,253
Investment securities available-for-sale	24,021	24,005
Other investments	2,101	1,596
Loans, net	628,818	611,625
Bank owned life insurance	15,100	15,311
Financial liabilities:
Deposits	623,408	639,269
FHLB advances	$ 37,710	16,769
PPPLF borrowings		100,813
Other borrowings		$ 5,000