Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Treasury Stock	Unallocated common stock of ESOP	Retained earnings	Accumulated other comprehensive income (loss)
Balance at Dec. 31, 2019	$ 58,665	$ 49	$ 19,981	$ 0	$ (1,685)	$ 40,213	$ 107
Net income	287					287
1895 Bancorp of Wisconsin, Inc. common stock held by PyraMax Bank reclassified to treasury stock	(175)			(175)
Other comprehensive loss	(124)						(124)
ESOP shares committed to be released (1,755 shares)	18		1		17
Balance at Mar. 31, 2020	58,671	49	19,982	(175)	(1,668)	40,500	(17)
Balance at Dec. 31, 2020	60,008	49	20,134	(1,228)	(1,615)	41,530	1,138
Net income	521					521
Other comprehensive loss	(594)						(594)
Purchase of treasury stock	(15)			(15)
ESOP shares committed to be released (1,755 shares)	21		3		18
Issuance of treasury stock – stock compensation plan			(15)	15
Stock compensation expense	58		58
Balance at Mar. 31, 2021	$ 59,999	$ 49	$ 20,180	$ (1,228)	$ (1,597)	$ 42,051	$ 544