Debt Securities - Schedule of Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Fair Value
Less than 12 Months, Fair Value	$ 12,006	$ 1,537
12 Months or More, Fair Value	2,435	39,755
Total fair value	14,441	41,292
Unrealized Losses
Less than 12 Months, Unrealized Losses	(144)	(8)
12 Months or More, Unrealized Losses	(40)	(214)
Total, unrealized losses	(184)	(222)
US Government Agencies Debt Securities
Fair Value
Less than 12 Months, Fair Value		0
12 Months or More, Fair Value		6,988
Total fair value		6,988
Unrealized Losses
Less than 12 Months, Unrealized Losses		0
12 Months or More, Unrealized Losses		(11)
Total, unrealized losses		(11)
Residential MBS of U.S. government agencies and GSEs
Fair Value
Less than 12 Months, Fair Value	227	1,144
12 Months or More, Fair Value	2,435	24,242
Total fair value	2,662	25,386
Unrealized Losses
Less than 12 Months, Unrealized Losses	(10)	(3)
12 Months or More, Unrealized Losses	(40)	(181)
Total, unrealized losses	(50)	(184)
Municipal bonds
Fair Value
Less than 12 Months, Fair Value		0
12 Months or More, Fair Value		4,895
Total fair value		4,895
Unrealized Losses
Less than 12 Months, Unrealized Losses		0
12 Months or More, Unrealized Losses		(7)
Total, unrealized losses		(7)
Corporate bonds
Fair Value
Less than 12 Months, Fair Value	11,779	393
12 Months or More, Fair Value	0	3,630
Total fair value	11,779	4,023
Unrealized Losses
Less than 12 Months, Unrealized Losses	(134)	(5)
12 Months or More, Unrealized Losses	0	(15)
Total, unrealized losses	$ (134)	$ (20)