Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Common stock	Additional paid-in capital	Retained earnings	Unearned employee stock ownership plan (ESOP)	Treasury shares	Accumulated other comprehensive income	Total
Balance at Jun. 30, 2018	$ 86	$ 35,085	$ 34,050	$ (663)	$ (1,355)		$ 67,203
Net income			305				305
Allocation of ESOP shares		(29)		94			65
Acquisition of shares for treasury					(487)		(487)
Change in accounting method			441				441
Other comprehensive income/loss						1	1
Cash dividends			(718)				(718)
Balance at Dec. 31, 2018	86	35,056	34,078	(569)	(1,842)	1	66,810
Balance at Sep. 30, 2018	86	35,085	34,264	(616)	(1,444)	(1)	67,374
Net income			167				167
Allocation of ESOP shares		(29)		47			18
Acquisition of shares for treasury					(398)		(398)
Change in accounting method
Other comprehensive income/loss						2	2
Cash dividends			(353)				(353)
Balance at Dec. 31, 2018	86	35,056	34,078	(569)	(1,842)	1	66,810
Balance at Jun. 30, 2019	86	35,056	33,867	(476)	(2,259)	4	66,278
Net income			482				482
Allocation of ESOP shares		(45)		93			48
Acquisition of shares for treasury					(312)		(312)
Other comprehensive income/loss						(1)	(1)
Cash dividends			(686)				(686)
Balance at Dec. 31, 2019	86	35,011	33,663	(383)	(2,571)	3	65,809
Balance at Sep. 30, 2019	86	35,022	33,767	(429)	(2,410)	4	66,040
Net income			248				248
Allocation of ESOP shares		(11)		46			35
Acquisition of shares for treasury					(161)		(161)
Other comprehensive income/loss						(1)	(1)
Cash dividends			(352)				(352)
Balance at Dec. 31, 2019	$ 86	$ 35,011	$ 33,663	$ (383)	$ (2,571)	$ 3	$ 65,809