Parent Company Financial Information - Condensed Cash Flow Statement (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 539	$ 606	$ 319	$ 135	$ 307	$ 439	$ 478	$ 255	$ 1,599	$ 1,583
Adjustments to reconcile net income to net cash provided by operating activities:
Decrease (increase) in other assets									206	(538)
Net cash provided by operating activities									2,992	4,136
Cash flows from financing activities:
Dividends paid									(1,128)	(1,122)
Net cash used in financing activities									(32,004)	22,241
Net in cash and cash equivalents									(2,664)	3,349
Glen Burnie Bancorp
Cash flows from operating activities:
Net income									1,599	1,583
Adjustments to reconcile net income to net cash provided by operating activities:
Decrease (increase) in other assets									2	2
(Decrease) increase in other liabilities										(1)
Decrease in due from subsidiaries										1
Change in undistributed equity of subsidiaries									(703)	(708)
Net cash provided by operating activities									898	877
Cash flows from financing activities:
Proceeds from dividend reinvestment plan									138	147
Dividends paid									(1,128)	(1,122)
Net cash used in financing activities									(990)	(975)
Net in cash and cash equivalents									(92)	(98)
Cash and cash equivalents at beginning of year				$ 135					135	233
Cash and cash equivalents at end of year	$ 43				$ 233				$ 43	$ 135