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Employee Benefit Plans (Details 1) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Components of net periodic pension cost:    
Interest cost $ 3,242 $ 3,471
Expected return on plan assets 2,185 (2,260)
Amortization of net loss 4,387 3,725
Service cost 0 0
Net periodic pension cost $ 9,814 $ 4,936