Commitments and Contingencies (Details Textual)	12 Months Ended
	Dec. 31, 2017 USD ($) Security	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Commitments and Contingencies (Textual) [Abstract]
Operating leases extending	2021
Rental and lease expense	$ 230,000	$ 183,000	$ 168,000
Aggregate cash reserves for federal regulatory requirements	$ 5,000,000
Percentage of unsecured loans	0.30%	0.36%
Third party interest rate swap
Commitments and Contingencies (Textual) [Abstract]
Security pledged for collateral	$ 1,400,000	$ 1,700,000
Third party interest rate swap | U.S. Government-sponsored mortgage-backed securities
Commitments and Contingencies (Textual) [Abstract]
Number of security owned and pledged as collateral | Security	1
Minimum
Commitments and Contingencies (Textual) [Abstract]
Operating leases renewal period	5 years
Maximum
Commitments and Contingencies (Textual) [Abstract]
Operating leases renewal period	10 years