Reclassification Adjustment of Accumulated Other Comprehensive Income ("AOCI") (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 104	$ 161
Other comprehensive loss before reclassifications	(32)	(57)
Amount reclassified from accumulated other comprehensive income	0	0
Other comprehensive loss	(32)	(57)
Ending balance	72	104
Unrealized gains and losses on Investment securities available for sale
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	94	150
Other comprehensive loss before reclassifications	(29)	(56)
Amount reclassified from accumulated other comprehensive income	0	0
Other comprehensive loss	(29)	(56)
Ending balance	65	94
Unrealized gains and losses on Interest-Only Strips
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	10	11
Other comprehensive loss before reclassifications	(3)	(1)
Amount reclassified from accumulated other comprehensive income	0	0
Other comprehensive loss	(3)	(1)
Ending balance	$ 7	$ 10