Changes in and Reclassifications Out of Accumulated Other Comprehensive Income - Changes in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive (Loss) Income
Beginning balance	$ 95,506	$ 96,365	$ 75,311	$ 76,630	$ 96,365	$ 76,630
Period change	307	357	(234)	(190)	664	(424)
Ending balance	$ 97,189	$ 95,506	$ 76,006	$ 75,311	97,189	76,006
Income tax rate	22.50%	22.50%	22.50%	22.50%
Gains (Losses) on Securities Available for Sale
Accumulated Other Comprehensive (Loss) Income
Beginning balance	$ 433	$ 76	$ 38	$ 228	76	228
Other comprehensive income (loss) before reclassifications	284	357	(234)	(118)
Amounts reclassified from accumulated other comprehensive income (loss)	23			(72)
Period change	307	357	(234)	(190)
Ending balance	$ 740	$ 433	$ (196)	$ 38	$ 740	$ (196)