Loans - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Loans
Gross loans evaluated by internal credit ratings	$ 199,183	$ 203,358
Gross loans evaluated by performance status	20,986	21,470
Performing
Loans
Gross loans evaluated by performance status	20,835	21,298
Non-performing
Loans
Gross loans evaluated by performance status	151	172
Pass
Loans
Gross loans evaluated by internal credit ratings	195,045	202,181
Special Mention
Loans
Gross loans evaluated by internal credit ratings	3,929	843
Substandard
Loans
Gross loans evaluated by internal credit ratings	209	334
Doubtful
Loans
Gross loans evaluated by internal credit ratings	0	0
Development
Loans
Gross loans evaluated by internal credit ratings	12,574	21,396
Development \| Pass
Loans
Gross loans evaluated by internal credit ratings	12,574	21,396
Development \| Special Mention
Loans
Gross loans evaluated by internal credit ratings	0	0
Development \| Substandard
Loans
Gross loans evaluated by internal credit ratings	0	0
Development \| Doubtful
Loans
Gross loans evaluated by internal credit ratings	0	0
Real estate
Loans
Gross loans evaluated by internal credit ratings	88,801	94,830
Real estate \| Pass
Loans
Gross loans evaluated by internal credit ratings	88,753	93,653
Real estate \| Special Mention
Loans
Gross loans evaluated by internal credit ratings	0	843
Real estate \| Substandard
Loans
Gross loans evaluated by internal credit ratings	48	334
Real estate \| Doubtful
Loans
Gross loans evaluated by internal credit ratings	0	0
Commercial and industrial
Loans
Gross loans evaluated by internal credit ratings	21,476	18,387
Commercial and industrial \| Pass
Loans
Gross loans evaluated by internal credit ratings	17,547	18,387
Commercial and industrial \| Special Mention
Loans
Gross loans evaluated by internal credit ratings	3,929	0
Commercial and industrial \| Substandard
Loans
Gross loans evaluated by internal credit ratings	0	0
Commercial and industrial \| Doubtful
Loans
Gross loans evaluated by internal credit ratings	0	0
One-to-four family owner-occupied
Loans
Gross loans evaluated by performance status	18,861	18,158
One-to-four family owner-occupied \| Performing
Loans
Gross loans evaluated by performance status	18,710	17,986
One-to-four family owner-occupied \| Non-performing
Loans
Gross loans evaluated by performance status	151	172
One-to-four family investor-owned
Loans
Gross loans evaluated by internal credit ratings	28,285	26,234
One-to-four family investor-owned \| Pass
Loans
Gross loans evaluated by internal credit ratings	28,124	26,234
One-to-four family investor-owned \| Special Mention
Loans
Gross loans evaluated by internal credit ratings	0	0
One-to-four family investor-owned \| Substandard
Loans
Gross loans evaluated by internal credit ratings	161	0
One-to-four family investor-owned \| Doubtful
Loans
Gross loans evaluated by internal credit ratings	0	0
Multifamily
Loans
Gross loans evaluated by internal credit ratings	48,047	42,511
Multifamily \| Pass
Loans
Gross loans evaluated by internal credit ratings	48,047	42,511
Multifamily \| Special Mention
Loans
Gross loans evaluated by internal credit ratings	0	0
Multifamily \| Substandard
Loans
Gross loans evaluated by internal credit ratings	0	0
Multifamily \| Doubtful
Loans
Gross loans evaluated by internal credit ratings	0	0
Consumer
Loans
Gross loans evaluated by performance status	2,125	3,312
Consumer \| Performing
Loans
Gross loans evaluated by performance status	2,125	3,312
Consumer \| Non-performing
Loans
Gross loans evaluated by performance status	$ 0	$ 0

FFBW, Inc. /MD/ 10-Q