Employee Benefit Plans (Detail Textuals) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 1988	Dec. 31, 1987	Dec. 31, 1985
Compensation and Retirement Disclosure [Abstract]
Amount borrowed					$ 2,000,000
Employee stock ownership plan, interest rate, description	Prime
Employee stock ownership plan, term of loan	40 years
Employee stock ownership plan, amount of additional loan			$ 1,942,000	$ 1,942,000
ESOP, number of allocated shares since inception	416,265
ESOP, number of unallocated shares	122,208	140,292
ESOP, compensation expenses	$ 101,000	$ 100,000