Parent Company Financial Information - Condensed Income Statement (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Condensed Income Statements, Captions [Line Items]
Other expenses									$ (10,952,000)	$ (11,696,000)
Income before income tax benefit and equity in undistributed net income of subsidiaries	$ 693,000	$ 1,131,000	$ 570,000	$ 699,000	$ 712,000	$ 1,232,000	$ (128,000)	$ 343,000	3,093,000	2,159,000
Income tax benefit									(577,000)	(491,000)
NET INCOME	$ 555,000	$ 888,000	$ 479,000	$ 594,000	$ 547,000	$ 949,000	$ (96,000)	$ 268,000	2,516,387	1,667,741
Glen Burnie Bancorp
Condensed Income Statements, Captions [Line Items]
Dividends and distributions from subsidiaries									1,200,000	1,265,000
Other expenses									(245,000)	(236,000)
Income before income tax benefit and equity in undistributed net income of subsidiaries									955,000	1,029,000
Income tax benefit									44,000	43,000
Change in undistributed equity of subsidiaries									1,517,000	596,000
NET INCOME									$ 2,516,000	$ 1,668,000