Reclassification Adjustment of Accumulated Other Comprehensive Income ("AOCI") (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 72	$ 104
Other comprehensive loss before reclassifications	(6)	(5)
Amount reclassified from accumulated other comprehensive income	0
Other comprehensive loss	(6)	(5)
Ending balance	66	99
Available for sale
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	65	94
Other comprehensive loss before reclassifications	(5)	(4)
Amount reclassified from accumulated other comprehensive income	0
Other comprehensive loss	(5)	(4)
Ending balance	60	90
Interest-Only Strips
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	7	10
Other comprehensive loss before reclassifications	(1)	(1)
Amount reclassified from accumulated other comprehensive income	0
Other comprehensive loss	(1)	(1)
Ending balance	$ 6	$ 9