Securities, Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020 USD ($) Security	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) Security	Dec. 31, 2019 USD ($)	Jun. 30, 2020 USD ($) Security
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 42,786		$ 42,786		$ 3,538
More than 12 months, fair value	0		0		0
Total, fair value	42,786		42,786		3,538
Less than 12 months, unrealized losses	379		379		17
More than 12 months, unrealized losses	0		0		0
Total, unrealized losses	$ 379		$ 379		$ 17
Less than 12 months, number of securities | Security	14		14		4
More than 12 months, number of securities | Security	0		0		0
Total, number of securities | Security	14		14		4
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 4,341		$ 4,341		$ 11,605
More than 12 months, fair value	473		473		361
Total, fair value	4,814		4,814		11,966
Less than 12 months, unrealized losses	11		11		41
More than 12 months, unrealized losses	22		22		128
Total, unrealized losses	$ 33		$ 33		$ 169
Less than 12 months, number of securities | Security	8		8		19
More than 12 months, number of securities | Security	1		1		1
Total, number of securities | Security	9		9		20
Total Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 47,127		$ 47,127		$ 15,143
More than 12 months, fair value	473		473		361
Total, fair value	47,600		47,600		15,504
Less than 12 months, unrealized losses	390		390		58
More than 12 months, unrealized losses	22		22		128
Total, unrealized losses	$ 412		$ 412		$ 186
Less than 12 months, number of securities | Security	22		22		23
More than 12 months, number of securities | Security	1		1		1
Total, number of securities | Security	23		23		24
Proceeds from sale of available-for-sale securities	$ 0	$ 0	$ 0	$ 0
Gross realized gains (losses) on sale of available-for-sale securities	0	0	0	0
Other-than-temporary impairment losses	0	$ 0	0	$ 0
U.S. Government Sponsored Enterprises [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	6,951		6,951
More than 12 months, fair value	0		0
Total, fair value	6,951		6,951
Less than 12 months, unrealized losses	48		48
More than 12 months, unrealized losses	0		0
Total, unrealized losses	$ 48		$ 48
Less than 12 months, number of securities | Security	2		2
More than 12 months, number of securities | Security	0		0
Total, number of securities | Security	2		2
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Total, unrealized losses					$ 0
State and Political Subdivisions [Member]
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 1,204		$ 1,204		3,336
More than 12 months, fair value	0		0		0
Total, fair value	1,204		1,204		3,336
Less than 12 months, unrealized losses	5		5		3
More than 12 months, unrealized losses	0		0		0
Total, unrealized losses	$ 5		$ 5		$ 3
Less than 12 months, number of securities | Security	6		6		12
More than 12 months, number of securities | Security	0		0		0
Total, number of securities | Security	6		6		12
Mortgage-backed Securities-Residential [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 1,925		$ 1,925
More than 12 months, fair value	0		0
Total, fair value	1,925		1,925
Less than 12 months, unrealized losses	1		1
More than 12 months, unrealized losses	0		0
Total, unrealized losses	$ 1		$ 1
Less than 12 months, number of securities | Security	1		1
More than 12 months, number of securities | Security	0		0
Total, number of securities | Security	1		1
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 1,640		$ 1,640		$ 3,604
More than 12 months, fair value	0		0		0
Total, fair value	1,640		1,640		3,604
Less than 12 months, unrealized losses	3		3		15
More than 12 months, unrealized losses	0		0		0
Total, unrealized losses	$ 3		$ 3		$ 15
Less than 12 months, number of securities | Security	1		1		2
More than 12 months, number of securities | Security	0		0		0
Total, number of securities | Security	1		1		2
Mortgage-backed Securities-Multi-family [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 32,916		$ 32,916		$ 1,051
More than 12 months, fair value	0		0		0
Total, fair value	32,916		32,916		1,051
Less than 12 months, unrealized losses	324		324		4
More than 12 months, unrealized losses	0		0		0
Total, unrealized losses	$ 324		$ 324		$ 4
Less than 12 months, number of securities | Security	10		10		1
More than 12 months, number of securities | Security	0		0		0
Total, number of securities | Security	10		10		1
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value					$ 3,562
More than 12 months, fair value					0
Total, fair value					3,562
Less than 12 months, unrealized losses					21
More than 12 months, unrealized losses					0
Total, unrealized losses	$ 0		$ 0		$ 21
Less than 12 months, number of securities | Security					3
More than 12 months, number of securities | Security					0
Total, number of securities | Security					3
Corporate Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	994		994		$ 2,487
More than 12 months, fair value	0		0		0
Total, fair value	994		994		2,487
Less than 12 months, unrealized losses	6		6		13
More than 12 months, unrealized losses	0		0		0
Total, unrealized losses	$ 6		$ 6		$ 13
Less than 12 months, number of securities | Security	1		1		3
More than 12 months, number of securities | Security	0		0		0
Total, number of securities | Security	1		1		3
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 1,497		$ 1,497		$ 1,103
More than 12 months, fair value	473		473		361
Total, fair value	1,970		1,970		1,464
Less than 12 months, unrealized losses	3		3		2
More than 12 months, unrealized losses	22		22		128
Total, unrealized losses	$ 25		$ 25		$ 130
Less than 12 months, number of securities | Security	1		1		2
More than 12 months, number of securities | Security	1		1		1
Total, number of securities | Security	2		2		3