Disclosures About Fair Value of Financial Instruments (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
IRLC, carrying amount	$ 333,000	$ 816,000
IRLC, fair value	333,000	816,000
Forward sales commitments, carrying amount	145,000	60,000
Forward sales commitments, fair value	145,000	60,000
Cash and cash equivalents	180,577,000	78,408,000	$ 89,150,000	$ 75,804,000
Cash and cash equivalents, fair value	180,577,000	78,408,000
Securities, carrying amount	271,570,000	107,024,000
Securities, fair value	271,570,000	107,024,000
Loans held for sale, carrying amount	3,610,000	58,679,000
Loans held for sale, fair value	3,610,000	58,679,000
Loans held for investment, net, carrying amount	647,400,000	650,854,000
Loans held for investment, net, fair value	638,419,000	639,472,000
Interest receivable, carrying amount	2,579,000	2,727,000
Interest receivable, fair value	2,579,000	2,727,000
Bank owned life insurance, carrying amount	22,714,000	22,647,000
Bank owned life insurance, fair value	22,714,000	22,647,000
Total assets, carrying amount	1,128,928,000	921,155,000
Total assets, fair value	1,119,947,000	909,773,000
Deposits, carrying amount	1,030,292,000	818,582,000
Deposits, fair value	1,048,928,000	834,857,000
Long-term debt, carrying amount	21,764,000	33,202,000
Long-term debt, fair value	22,328,000	33,834,000
Interest payable, carrying amount	298,000	261,000
Interest payable, fair value	298,000	261,000
Total liabilities, carrying amount	1,052,354,000	852,105,000
Total liabilities, fair value	1,071,614,000	869,012,000
Fair Value Inputs Level 2
IRLC, carrying amount	333,000	816,000
Forward sales commitments, carrying amount	145,000	60,000
Cash and cash equivalents, fair value	0	0
Securities, fair value	271,570,000	107,024,000
Loans held for sale, fair value	3,610,000	58,679,000
Loans held for investment, net, fair value	0	0
Interest receivable, fair value	2,579,000	2,727,000
Bank owned life insurance, fair value	22,714,000	22,647,000
Total assets, fair value	300,951,000	191,893,000
Deposits, fair value	918,546,000	702,940,000
Long-term debt, fair value	0	0
Interest payable, fair value	298,000	261,000
Total liabilities, fair value	918,844,000	703,261,000
Fair Value Inputs Level 1
Cash and cash equivalents, fair value	180,577,000	78,408,000
Securities, fair value	0	0
Loans held for sale, fair value	0	0
Loans held for investment, net, fair value	0	0
Interest receivable, fair value	0	0
Bank owned life insurance, fair value	0	0
Total assets, fair value	180,577,000	78,408,000
Deposits, fair value	0	0
Long-term debt, fair value	0	0
Interest payable, fair value	0	0
Total liabilities, fair value	0	0
Fair Value Inputs Level 3
Cash and cash equivalents, fair value	0	0
Securities, fair value	0	0
Loans held for sale, fair value	0	0
Loans held for investment, net, fair value	638,419,000	639,472,000
Interest receivable, fair value	0	0
Bank owned life insurance, fair value	0	0
Total assets, fair value	638,419,000	639,472,000
Deposits, fair value	130,382,000	131,917,000
Long-term debt, fair value	0	33,834,000
Interest payable, fair value	0	0
Total liabilities, fair value	$ 152,770,000	$ 165,751,000