Assets measured at fair value - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets at fair value on a recurring basis
U.S. Government Agency notes
Municipal bonds
U.S. Government agencies and U.S. Government-sponsored enterprises
U.S. Government agencies
Corporate bonds
Securities available-for-sale
CRA mutual funds		882
Assets at fair value on a non-recurring basis
Collateral dependent impaired loans
Other real estate owned
Fair Value, Inputs, Level 1 [Member]
Assets at fair value on a recurring basis
U.S. Government Agency notes
Municipal bonds
U.S. Government agencies and U.S. Government-sponsored enterprises
U.S. Government agencies
Corporate bonds
Securities available-for-sale
CRA mutual funds	916
Assets at fair value on a non-recurring basis
Collateral dependent impaired loans
Other real estate owned
Derivative financial instruments
Fair Value, Inputs, Level 2 [Member]
Assets at fair value on a recurring basis
U.S. Government Agency notes	5,787	4,644
Municipal bonds	26,558	27,193
U.S. Government agencies and U.S. Government-sponsored enterprises	36,508	29,357
U.S. Government agencies	19,037	25,499
Corporate bonds	7,830	5,108
Securities available-for-sale	95,720	91,801
CRA mutual funds
Assets at fair value on a non-recurring basis
Collateral dependent impaired loans
Other real estate owned
Derivative financial instruments	3
Fair Value, Inputs, Level 3 [Member]
Assets at fair value on a recurring basis
U.S. Government Agency notes
Municipal bonds
U.S. Government agencies and U.S. Government-sponsored enterprises
U.S. Government agencies
Corporate bonds
Securities available-for-sale
CRA mutual funds
Assets at fair value on a non-recurring basis
Collateral dependent impaired loans	2,010	1,593
Other real estate owned		314
Derivative financial instruments
Fair Value, Inputs, Level 1, 2 and 3 [Member]
Assets at fair value on a recurring basis
U.S. Government Agency notes	5,787
Municipal bonds	26,558
U.S. Government agencies and U.S. Government-sponsored enterprises	36,508
U.S. Government agencies	19,037
Corporate bonds	7,830
Securities available-for-sale	95,720
CRA mutual funds	916
Assets at fair value on a non-recurring basis
Collateral dependent impaired loans	2,010
Other real estate owned
Derivative financial instruments	$ 3
Fair Value, Recurring [Member]
Assets at fair value on a recurring basis
U.S. Government Agency notes		4,644
Municipal bonds		27,193
U.S. Government agencies and U.S. Government-sponsored enterprises		29,357
U.S. Government agencies		25,499
Corporate bonds		5,108
Securities available-for-sale		91,801
CRA mutual funds		882
Assets at fair value on a non-recurring basis
Collateral dependent impaired loans		1,593
Other real estate owned		$ 314