Fair Value Measurements and Disclosure - Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
AFS Securities:
Total AFS securities	$ 87,917	$ 76,312
Marketable equity securities	3,865	3,776
Impaired loans
Total	95,114	80,232
Description of Liabilities
Total	10,081	10,808
U.S. Government agencies
AFS Securities:
Total AFS securities	34,942	28,699
U.S. Government collateralized mortgage obligations
AFS Securities:
Total AFS securities	42,897	47,613
Asset-backed securities
AFS Securities:
Total AFS securities	3,828
Municipal bonds
AFS Securities:
Total AFS securities	1,058
Corporate bonds
AFS Securities:
Total AFS securities	5,192
Recurring
AFS Securities:
Total AFS securities	87,917	76,312
Marketable equity securities	3,865	3,776
Description of Liabilities
Junior subordinated debt	10,081	10,808
Recurring | U.S. Government agencies
AFS Securities:
Total AFS securities	34,942	28,699
Recurring | U.S. Government collateralized mortgage obligations
AFS Securities:
Total AFS securities	42,897	47,613
Recurring | Asset-backed securities
AFS Securities:
Total AFS securities	3,828
Recurring | Corporate bonds
AFS Securities:
Total AFS securities	5,192
Nonrecurring
Impaired loans
Total impaired loans	3,332	144
Real estate mortgage		144
Nonrecurring | Real estate construction and development
Impaired loans
Total impaired loans	3,332
Nonrecurring | Other real estate owned
Impaired loans
Real estate mortgage	5,018
Quoted Prices in Active Markets for Identical Assets (Level 1)
Impaired loans
Total	3,865	3,776
Description of Liabilities
Junior subordinated debt	0	0
Total	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring
AFS Securities:
Total AFS securities	0	0
Marketable equity securities	3,865	3,776
Description of Liabilities
Junior subordinated debt	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring | U.S. Government agencies
AFS Securities:
Total AFS securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring | U.S. Government collateralized mortgage obligations
AFS Securities:
Total AFS securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring | Asset-backed securities
AFS Securities:
Total AFS securities	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring | Municipal bonds
AFS Securities:
Total AFS securities	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Recurring | Corporate bonds
AFS Securities:
Total AFS securities	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Nonrecurring
Impaired loans
Total impaired loans	0	0
Real estate mortgage		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Nonrecurring | Real estate construction and development
Impaired loans
Total impaired loans	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Nonrecurring | Other real estate owned
Impaired loans
Real estate mortgage	0
Significant Other Observable Inputs (Level 2)
Impaired loans
Total	87,917	76,312
Description of Liabilities
Junior subordinated debt	0	0
Total	0	0
Significant Other Observable Inputs (Level 2) | Recurring
AFS Securities:
Total AFS securities	87,917	76,312
Marketable equity securities	0	0
Description of Liabilities
Junior subordinated debt	0	0
Significant Other Observable Inputs (Level 2) | Recurring | U.S. Government agencies
AFS Securities:
Total AFS securities	34,942	28,699
Significant Other Observable Inputs (Level 2) | Recurring | U.S. Government collateralized mortgage obligations
AFS Securities:
Total AFS securities	42,897	47,613
Significant Other Observable Inputs (Level 2) | Recurring | Asset-backed securities
AFS Securities:
Total AFS securities	3,828
Significant Other Observable Inputs (Level 2) | Recurring | Corporate bonds
AFS Securities:
Total AFS securities	5,192
Significant Other Observable Inputs (Level 2) | Nonrecurring
Impaired loans
Total impaired loans	0	0
Real estate mortgage		0
Significant Other Observable Inputs (Level 2) | Nonrecurring | Real estate construction and development
Impaired loans
Total impaired loans	0
Significant Other Observable Inputs (Level 2) | Nonrecurring | Other real estate owned
Impaired loans
Real estate mortgage	0
Significant Unobservable Inputs (Level 3)
Impaired loans
Total	3,332	144
Description of Liabilities
Junior subordinated debt	10,081	10,808
Total	10,081	10,808
Significant Unobservable Inputs (Level 3) | Recurring
AFS Securities:
Total AFS securities	0	0
Marketable equity securities	0	0
Description of Liabilities
Junior subordinated debt	10,081	10,808
Significant Unobservable Inputs (Level 3) | Recurring | U.S. Government agencies
AFS Securities:
Total AFS securities	0	0
Significant Unobservable Inputs (Level 3) | Recurring | U.S. Government collateralized mortgage obligations
AFS Securities:
Total AFS securities	0	0
Significant Unobservable Inputs (Level 3) | Recurring | Asset-backed securities
AFS Securities:
Total AFS securities	0
Significant Unobservable Inputs (Level 3) | Recurring | Municipal bonds
AFS Securities:
Total AFS securities	0
Significant Unobservable Inputs (Level 3) | Recurring | Corporate bonds
AFS Securities:
Total AFS securities	0
Significant Unobservable Inputs (Level 3) | Nonrecurring
Impaired loans
Total impaired loans	3,332	144
Real estate mortgage		$ 144
Significant Unobservable Inputs (Level 3) | Nonrecurring | Real estate construction and development
Impaired loans
Total impaired loans	3,332
Significant Unobservable Inputs (Level 3) | Nonrecurring | Other real estate owned
Impaired loans
Real estate mortgage	$ 5,018