Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Recurring fair value measurement [Abstract]
Equity securities with a readily determinable fair value, at fair value	$ 2,185	$ 2,078
Debt securities, available-for-sale, at fair value	217,668	238,421
Recurring [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	219,853	240,499
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	4,442	4,313
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	215,411	236,186
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	0	0
Nonrecurring [Member]
Recurring fair value measurement [Abstract]
Fair Value	1,327	1,283
Nonrecurring fair value measurements:
Impaired loans	1,083	1,039
Other real estate owned and repossessed assets	244	244
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Recurring fair value measurement [Abstract]
Fair Value	0	0
Nonrecurring fair value measurements:
Impaired loans	0	0
Other real estate owned and repossessed assets	0	0
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Recurring fair value measurement [Abstract]
Fair Value	0	0
Nonrecurring fair value measurements:
Impaired loans	0	0
Other real estate owned and repossessed assets	0	0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Recurring fair value measurement [Abstract]
Fair Value	1,327	1,283
Nonrecurring fair value measurements:
Impaired loans	1,083	1,039
Other real estate owned and repossessed assets	244	244
U.S. Treasury notes [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	2,257	2,235
U.S. Treasury notes [Member] | Recurring [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	2,257	2,235
U.S. Treasury notes [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	2,257	2,235
U.S. Treasury notes [Member] | Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	0	0
U.S. Treasury notes [Member] | Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	0	0
U.S. Agency notes [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	74,450	78,340
U.S. Agency notes [Member] | Recurring [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	74,450	78,340
U.S. Agency notes [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	0	0
U.S. Agency notes [Member] | Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	74,450	78,340
U.S. Agency notes [Member] | Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	0	0
U.S. Agency mortgage-backed securities [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	54,566	55,610
U.S. Agency mortgage-backed securities [Member] | Recurring [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	54,566	55,610
U.S. Agency mortgage-backed securities [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	0	0
U.S. Agency mortgage-backed securities [Member] | Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	54,566	55,610
U.S. Agency mortgage-backed securities [Member] | Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	0	0
Non-taxable Municipal securities [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	69,715	84,714
Non-taxable Municipal securities [Member] | Recurring [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	69,715	84,714
Non-taxable Municipal securities [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	0	0
Non-taxable Municipal securities [Member] | Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	69,715	84,714
Non-taxable Municipal securities [Member] | Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	0	0
Taxable Municipal securities [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	16,680	17,522
Taxable Municipal securities [Member] | Recurring [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	16,680	17,522
Taxable Municipal securities [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	0	0
Taxable Municipal securities [Member] | Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	16,680	17,522
Taxable Municipal securities [Member] | Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Recurring fair value measurement [Abstract]
Debt securities, available-for-sale, at fair value	0	0
Mutual funds [Member] | Recurring [Member]
Recurring fair value measurement [Abstract]
Equity securities with a readily determinable fair value, at fair value	43
Equity securities with a readily determinable fair value:		39
Mutual funds [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Recurring fair value measurement [Abstract]
Equity securities with a readily determinable fair value, at fair value	43
Equity securities with a readily determinable fair value:		39
Mutual funds [Member] | Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Recurring fair value measurement [Abstract]
Equity securities with a readily determinable fair value, at fair value	0
Equity securities with a readily determinable fair value:		0
Mutual funds [Member] | Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Recurring fair value measurement [Abstract]
Equity securities with a readily determinable fair value, at fair value	0
Equity securities with a readily determinable fair value:		0
Mutual Funds Measured At Net Asset Value [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Recurring fair value measurement [Abstract]
Equity securities with a readily determinable fair value, at fair value	1,256
Equity securities with a readily determinable fair value:		1,520
Mutual Funds Measured At Net Asset Value [Member] | Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Recurring fair value measurement [Abstract]
Equity securities with a readily determinable fair value, at fair value	0
Equity securities with a readily determinable fair value:		0
Mutual Funds Measured At Net Asset Value [Member] | Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Recurring fair value measurement [Abstract]
Equity securities with a readily determinable fair value, at fair value	0
Equity securities with a readily determinable fair value:		0
Equity securities [Member] | Recurring [Member]
Recurring fair value measurement [Abstract]
Equity securities with a readily determinable fair value, at fair value	886
Equity securities with a readily determinable fair value:		519
Equity securities [Member] | Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Recurring fair value measurement [Abstract]
Equity securities with a readily determinable fair value, at fair value	886
Equity securities with a readily determinable fair value:		519
Equity securities [Member] | Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Recurring fair value measurement [Abstract]
Equity securities with a readily determinable fair value, at fair value	0
Equity securities with a readily determinable fair value:		0
Equity securities [Member] | Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Recurring fair value measurement [Abstract]
Equity securities with a readily determinable fair value, at fair value	$ 0
Equity securities with a readily determinable fair value:		$ 0