Parent Company Only Condensed Financial Information - Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets:
Cash and cash equivalents	$ 22,219	$ 18,430	$ 67,839
Other assets	856	1,188
Total assets	413,704	429,083
Liabilities and stockholders' equity
Junior subordinated debentures	5,100	5,100
Accrued expenses and other liabilities	3,512	5,202
Stockholders' equity	47,731	45,526	46,163
Total liabilities and stockholders' equity	413,704	429,083
Broadway Financial Corporation
Assets:
Cash and cash equivalents	400	895	$ 2,016
Investment in bank subsidiary	50,594	47,747
Other assets	2,015	2,345
Total assets	53,009	50,987
Liabilities and stockholders' equity
Junior subordinated debentures	5,100	5,100
Accrued expenses and other liabilities	178	361
Stockholders' equity	47,731	45,526
Total liabilities and stockholders' equity	$ 53,009	$ 50,987