Parent Company Only Condensed Financial Information - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities
Net (loss) income	$ (206)	$ 815
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Change in other assets	124	187
Change in accrued expenses and other liabilities	310	(120)
Net cash provided by operating activities	8,533	234
Cash flows from investing activities
Net cash used in investing activities	(39,149)	(818)
Cash flows from financing activities
Net cash provided by (used in) financing activities	29,531	(4,984)
Net change in cash and cash equivalents	(1,085)	(5,568)
Cash and cash equivalents at beginning of the year	16,651	22,219
Cash and cash equivalents at end of the year	15,566	16,651
Reportable Legal Entities | Broadway Financial Corporation
Cash flows from operating activities
Net (loss) income	(206)	815
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Equity in undistributed subsidiary income	(459)	(1,297)
Change in other assets	(287)	(210)
Change in accrued expenses and other liabilities	(9)	(112)
Net cash provided by operating activities	(961)	(804)
Cash flows from investing activities
Dividends from bank subsidiary	1,650	600
Net cash used in investing activities	1,650	600
Cash flows from financing activities
Common stock repurchased for tax withholdings	(14)	(108)
Repayments of borrowings	(765)
Proceeds from repayment of ESOP loan	68	68
Net cash provided by (used in) financing activities	(711)	(40)
Net change in cash and cash equivalents	(22)	(244)
Cash and cash equivalents at beginning of the year	156	400
Cash and cash equivalents at end of the year	$ 134	$ 156