Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jan. 16, 2020	Dec. 31, 2021	Dec. 31, 2020
Common stock, outstanding (in shares)		6,734,970	7,695,214
Stock issued during period, shares	4,268,570
Issuance of common stock, net of issuance costs	$ 41,500
Purchase of ESOP shares (in shares)			341,485
Sale of stock, price per share	$ 10.00
Provision for income taxes		$ 646	$ 566
Direct costs of the conversion and public offering			1,152
Unrecognized tax benefits, income tax penalties and interest expense		0
Customer deposits		255,250	226,498
Loans acquired		$ 222,104	$ 214,723
Before Conversion [Member]
Common stock, outstanding (in shares)			6,566,478
Owned by Public [Member]
Common stock, outstanding (in shares)			2,929,603
Percentage of common stock outstanding to eligible Members			44.60%
FFBW Community Foundation [Member]
Common stock, outstanding (in shares)			25,000
FFBW, MHC [Member]
Common stock, outstanding (in shares)			3,636,875
Stock issued during period, shares	3,436,430
Percentage of shares held by Mutual Holding Company			55.40%