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