Fair Value Measurements and Disclosure - Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
AFS Securities:
Total AFS securities	$ 77,864	$ 66,426
Marketable equity securities	3,787	3,659
Impaired loans
Total impaired loans	1,008
Total	82,659	70,474
Description of Liabilities
Total	10,330	10,155
U.S. Government agencies
AFS Securities:
Total AFS securities	31,166	36,527
U.S. Government sponsored entities & agencies collateralized by mortgage obligations
AFS Securities:
Total AFS securities	46,698	29,899
Fair value, measurements, recurring
AFS Securities:
Total AFS securities	77,864	66,426
Marketable equity securities	3,787	3,659
Description of Liabilities
Junior subordinated debt	10,330	10,155
Fair value, measurements, recurring | U.S. Government agencies
AFS Securities:
Total AFS securities	31,166	36,527
Fair value, measurements, recurring | U.S. Government sponsored entities & agencies collateralized by mortgage obligations
AFS Securities:
Total AFS securities	46,698	29,899
Fair value, measurements, nonrecurring
Impaired loans
Real estate mortgage	1,008
Total impaired loans		389
Fair value, measurements, nonrecurring | Real estate mortgage
Impaired loans
Real estate mortgage		389
Quoted Prices in Active Markets for Identical Assets (Level 1)
Impaired loans
Total	3,787	3,659
Description of Liabilities
Junior subordinated debt	0	0
Total	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair value, measurements, recurring
AFS Securities:
Total AFS securities	0	0
Marketable equity securities	3,787	3,659
Description of Liabilities
Junior subordinated debt	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair value, measurements, recurring | U.S. Government agencies
AFS Securities:
Total AFS securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair value, measurements, recurring | U.S. Government sponsored entities & agencies collateralized by mortgage obligations
AFS Securities:
Total AFS securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair value, measurements, nonrecurring
Impaired loans
Total impaired loans	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair value, measurements, nonrecurring | Real estate mortgage
Impaired loans
Real estate mortgage	0	0
Significant Other Observable Inputs (Level 2)
Impaired loans
Total	77,864	66,426
Description of Liabilities
Junior subordinated debt	0	0
Total	0	0
Significant Other Observable Inputs (Level 2) | Fair value, measurements, recurring
AFS Securities:
Total AFS securities	77,864	66,426
Marketable equity securities	0	0
Description of Liabilities
Junior subordinated debt	0	0
Significant Other Observable Inputs (Level 2) | Fair value, measurements, recurring | U.S. Government agencies
AFS Securities:
Total AFS securities	31,166	36,527
Significant Other Observable Inputs (Level 2) | Fair value, measurements, recurring | U.S. Government sponsored entities & agencies collateralized by mortgage obligations
AFS Securities:
Total AFS securities	46,698	29,899
Significant Other Observable Inputs (Level 2) | Fair value, measurements, nonrecurring
Impaired loans
Total impaired loans	0	0
Significant Other Observable Inputs (Level 2) | Fair value, measurements, nonrecurring | Real estate mortgage
Impaired loans
Real estate mortgage		0
Significant Unobservable Inputs (Level 3)
Impaired loans
Total impaired loans	1,008
Total	1,008	389
Description of Liabilities
Junior subordinated debt	10,330	10,155
Total	10,330	10,155
Significant Unobservable Inputs (Level 3) | Fair value, measurements, recurring
AFS Securities:
Total AFS securities	0	0
Marketable equity securities	0	0
Description of Liabilities
Junior subordinated debt	10,330	10,155
Significant Unobservable Inputs (Level 3) | Fair value, measurements, recurring | U.S. Government agencies
AFS Securities:
Total AFS securities	0	0
Significant Unobservable Inputs (Level 3) | Fair value, measurements, recurring | U.S. Government sponsored entities & agencies collateralized by mortgage obligations
AFS Securities:
Total AFS securities	$ 0	0
Significant Unobservable Inputs (Level 3) | Fair value, measurements, nonrecurring
Impaired loans
Total impaired loans		389
Significant Unobservable Inputs (Level 3) | Fair value, measurements, nonrecurring | Real estate mortgage
Impaired loans
Real estate mortgage		$ 389