Reclassification Adjustment of Accumulated Other Comprehensive Income ("AOCI") (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 104	$ 161
Other comprehensive loss before reclassifications	(5)	(13)
Amount reclassified from accumulated other comprehensive income	0	0
Net other comprehensive loss	(5)	(13)
Ending balance	99	148
Available for sale
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	94	150
Other comprehensive loss before reclassifications	(4)	(12)
Amount reclassified from accumulated other comprehensive income	0	0
Net other comprehensive loss	(4)	(12)
Ending balance	90	138
Interest-Only Strips
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	10	11
Other comprehensive loss before reclassifications	(1)	(1)
Amount reclassified from accumulated other comprehensive income	0	0
Net other comprehensive loss	(1)	(1)
Ending balance	$ 9	$ 10