Employee Benefit Plans - 401k and ESOP (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Dec. 21, 2016	Dec. 31, 2016	Dec. 31, 2015
Broadway Federal 401(k) Plan
Employer match of employee contributions of the first 6% of eligible compensation (as a percent)		50.00%
Expense		$ 93	$ 46
ESOP Plan
Number of common stock purchased by ESOP (in shares)	1,493,679
Purchase price of common stock	$ 1.59
Total cost of shares purchased by ESOP	$ 2,400
Loan to ESOP	$ 1,200	1,176
Term of ESOP loan (in years)	20 years
Compensation expense		$ 12	$ 1,300
Allocated to participants		1,114,683	360,752
Suspense shares		739,748
Total ESOP shares		1,854,431	360,752
Fair value of unearned shares		$ 1,213
Shares committed to be released		0
Maximum
Broadway Federal 401(k) Plan
Employee contributions as a percentage of their compensation		15.00%
Percentage of eligible compensation, matched 50% by employer		6.00%