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Investment Securities (Details) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) security shares | Dec. 31, 2017 USD ($) security shares | Oct. 01, 2018 USD ($)
Schedule of Available-for-sale Securities |  |  |  |
Impairment charges to securities |  | $ 0 | $ 0 |
Credit related impairment loss on securities |  | $ 0 |  |
Common stock, shares outstanding | shares |  | 2,814,157 | 2,801,149 |
Proceeds from sales of available for sale securities |  | $ 0 | $ 956,255 |
Total Unrealized Loss |  | 2,081,000 | 1,282,000 |
Total Fair Value |  | 68,513,000 | 60,829,000 |
Income tax expense relating to net gains on sales of investment securities |  |  | $ 555 |
Percentage of income tax expense relating to net gains on sale of investment securities |  |  | 39.44% |
Realized loss on sale |  |  | $ 0 |
Realized gain on sale |  |  | 1,406 |
Interest rate swap |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Investment securities pledged as collateral |  | 800,000 | 800,000 |
Maryland Financial Bank |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Common stock, shares outstanding | shares | 5,000 |  |  |
Common stock, value outstanding | $ 30,000 | 5,000 |  | $ 5,000
Total Unrealized Loss | $ 25,000 | $ 25,000 |  |
Maryland Financial Bank | Minimum |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Liquidating distributions (per share) | $ / shares | $ 0.25 |  |  |
Maryland Financial Bank | Maximum |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Liquidating distributions (per share) | $ / shares | $ 1.00 |  |  |
U.S. Government agency securities |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Number of securities continuous unrealized loss position more than twelve months | security |  | 2 |  |
Total Unrealized Loss |  | $ 40,000 | 46,000 |
Total Fair Value |  | $ 1,959,000 | $ 3,480,000 |
Collateralized mortgage obligations |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Number of securities continuous unrealized loss position more than twelve months | security |  | 52 |  |
Number of investment securities portfolio held | security |  | 0 | 0 |
Total Unrealized Loss |  | $ 662,000 | $ 570,000 |
Total Fair Value |  | $ 19,171,000 | 22,209,000 |
Agency mortgage-backed securities |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Number of securities continuous unrealized loss position more than twelve months | security |  | 45 |  |
U.S. Treasury securities |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Number of securities continuous unrealized loss position more than twelve months | security |  | 2 |  |
Total Unrealized Loss |  | $ 11,000 | 7,000 |
Total Fair Value |  | $ 990,000 | 1,494,000 |
Municipal securities |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Number of securities continuous unrealized loss position more than twelve months | security |  | 41 |  |
Total Unrealized Loss |  | $ 454,000 | 159,000 |
Total Fair Value |  | $ 21,577,000 | $ 8,626,000 |
Private Label Mortgage-Backed securities |  |  |  |
Schedule of Available-for-sale Securities |  |  |  |
Number of investment securities portfolio held | security |  | 0 | 0 |

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