Parent Company Financial Information - Condensed Income 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
Condensed Income Statements, Captions [Line Items]
Other expenses									$ (11,946)	$ (11,539)
Income before income tax benefit and equity in undistributed net income of subsidiaries	$ 676	$ 818	$ 386	$ 171	$ 365	$ 528	$ 433	$ 283	2,051	1,713
Income tax benefit									(452)	(130)
NET INCOME	$ 539	$ 606	$ 319	$ 135	$ 307	$ 439	$ 478	$ 255	1,599	1,583
Glen Burnie Bancorp
Condensed Income Statements, Captions [Line Items]
Dividends and distributions from subsidiaries									1,070	977
Other expenses									(206)	(140)
Income before income tax benefit and equity in undistributed net income of subsidiaries									864	837
Income tax benefit									32	38
Change in undistributed equity of subsidiaries									703	708
NET INCOME									$ 1,599	$ 1,583