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Parent Company Financial Information - Condensed Cash Flow Statement (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |
Net income | $ (152) | $ 411 | $ 338 | $ 316 | $ 395 | $ 115 | $ 308 | $ 283 | $ 911 | $ 1,101
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |
Decrease (increase) in other assets |  |  |  |  |  |  |  |  | 550 | (413)
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 3,253 | 2,585
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |
Dividends paid |  |  |  |  |  |  |  |  | (1,117) | (1,112)
Net cash used in financing activities |  |  |  |  |  |  |  |  | 25 | (2,907)
(Decrease) increase in cash |  |  |  |  |  |  |  |  | 1,983 | (1,749)
Cash and cash equivalents at beginning of year |  |  |  | 10,622 |  |  |  | 12,371 | 10,622 | 12,371
Cash and cash equivalents at end of year | 12,605 |  |  |  | 10,622 |  |  |  | 12,605 | 10,622
Glen Burnie Bancorp |  |  |  |  |  |  |  |  |  |
Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  | 911 | 1,101
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |
Decrease (increase) in other assets |  |  |  |  |  |  |  |  | 7 | (3)
Increase (decrease) in other liabilities |  |  |  |  |  |  |  |  | 1 | (10)
Decrease (increase) in due from subsidiaries |  |  |  |  |  |  |  |  | 2 | 3
Change in undistributed equity of subsidiaries |  |  |  |  |  |  |  |  | 110 | (152)
Net cash provided by operating activities |  |  |  |  |  |  |  |  | 1,031 | 939
Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |
Proceeds from dividend reinvestment plan |  |  |  |  |  |  |  |  | 151 | 157
Dividends paid |  |  |  |  |  |  |  |  | (1,117) | (1,111)
Net cash used in financing activities |  |  |  |  |  |  |  |  | (966) | (954)
(Decrease) increase in cash |  |  |  |  |  |  |  |  | 64 | (15)
Cash and cash equivalents at beginning of year |  |  |  | $ 169 |  |  |  | $ 184 | 169 | 184
Cash and cash equivalents at end of year | $ 233 |  |  |  | $ 169 |  |  |  | $ 233 | $ 169

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