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Investment Securities (Details)
 12 Months Ended
Dec. 31, 2017
USD ($)
security
Dec. 31, 2016
USD ($)
Schedule of Available-for-sale Securities    
Impairment charges to securities $ 0 $ 0
Credit related impairment loss on securities 0 0
Proceeds from sales of available for sale securities 956,255 5,265,658
Total Unrealized Loss 1,282,000 1,448,000
Total Fair Value 60,829,000 72,883,000
Realized gain on sale 1,406 21,653
Realized loss on sale 0 19,237
Income tax expense relating to net gains on sales of investment securities $ 555 $ 953
Percentage of income tax expense relating to net gains on sale of investment securities 39.44% 39.44%
Interest rate swap    
Schedule of Available-for-sale Securities    
Investment securities pledged as collateral $ 800,000 $ 0
U.S. Government agency securities    
Schedule of Available-for-sale Securities    
Number of securities continuous unrealized loss position more than twelve months | security 5  
Total Unrealized Loss $ 46,000 17,000
Total Fair Value 3,480,000 986,000
Collaterized mortgage obligations    
Schedule of Available-for-sale Securities    
Debt securities $ 0 0
Number of securities continuous unrealized loss position more than twelve months | security 51  
Total Unrealized Loss $ 570,000 422,000
Total Fair Value $ 22,209,000 27,019,000
Agency mortgage-backed securities    
Schedule of Available-for-sale Securities    
Number of securities continuous unrealized loss position more than twelve months | security 39  
Total Unrealized Loss $ 500,000 429,000
Total Fair Value $ 25,020,000 25,678,000
U.S. Treasury securities    
Schedule of Available-for-sale Securities    
Number of securities continuous unrealized loss position more than twelve months | security 3  
Total Unrealized Loss $ 7,000  
Total Fair Value $ 1,494,000  
Municipal securities    
Schedule of Available-for-sale Securities    
Number of securities continuous unrealized loss position more than twelve months | security 16  
Total Unrealized Loss $ 159,000 580,000
Total Fair Value 8,626,000 19,200,000
Private Label Mortgage-Backed securities    
Schedule of Available-for-sale Securities    
Debt securities $ 0 $ 0