Securities, Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020 USD ($) Security	Mar. 31, 2019 USD ($)	Mar. 31, 2020 USD ($) Security	Mar. 31, 2019 USD ($)	Jun. 30, 2019 USD ($) Security
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 27,502		$ 27,502		$ 856
More than 12 months, fair value	0		0		0
Total, fair value	27,502		27,502		856
Less than 12 months, unrealized losses	197		197		20
More than 12 months, unrealized losses	0		0		0
Total, unrealized losses	$ 197		$ 197		$ 20
Less than 12 months, number of securities | Security	13		13		1
More than 12 months, number of securities | Security	0		0		0
Total, number of securities | Security	13		13		1
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 31,843		$ 31,843		$ 4,791
Less than 12 months, unrealized losses	$ 280		$ 280		$ 23
Less than 12 months, number of securities | Security	118		118		23
More than 12 months, fair value	$ 1,653		$ 1,653		$ 8,348
More than 12 months, unrealized losses	$ 38		$ 38		$ 56
More than 12 months, number of securities | Security	16		16		18
Total, fair value	$ 33,496		$ 33,496		$ 13,139
Total, unrealized losses	$ 318		$ 318		$ 79
Total, number of securities | Security	135		135		41
Total Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 59,345		$ 59,345		$ 5,647
Less than 12 months, unrealized losses	$ 477		$ 477		$ 43
Less than 12 months, number of securities | Security	131		131		24
More than 12 months, fair value	$ 1,653		$ 1,653		$ 8,348
More than 12 months, unrealized losses	$ 38		$ 38		$ 56
More than 12 months, number of securities | Security	16		16		18
Total, fair value	$ 60,998		$ 60,998		$ 13,995
Total, unrealized losses	$ 515		$ 515		$ 99
Total, number of securities | Security	147		147		42
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]
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value					$ 0
Less than 12 months, unrealized losses					$ 0
Less than 12 months, number of securities | Security					0
More than 12 months, fair value					$ 1,986
More than 12 months, unrealized losses					$ 14
More than 12 months, number of securities | Security					1
Total, fair value					$ 1,986
Total, unrealized losses	0		0		$ 14
Total, number of securities | Security					1
State and Political Subdivisions [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	23,401		23,401
More than 12 months, fair value	0		0
Total, fair value	23,401		23,401
Less than 12 months, unrealized losses	65		65
More than 12 months, unrealized losses	0		0
Total, unrealized losses	$ 65		$ 65
Less than 12 months, number of securities | Security	7		7
More than 12 months, number of securities | Security	0		0
Total, number of securities | Security	7		7
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 26,827		$ 26,827		$ 3,541
Less than 12 months, unrealized losses	$ 269		$ 269		$ 17
Less than 12 months, number of securities | Security	113		113		22
More than 12 months, fair value	$ 1,201		$ 1,201		$ 2,111
More than 12 months, unrealized losses	$ 5		$ 5		$ 6
More than 12 months, number of securities | Security	15		15		13
Total, fair value	$ 28,028		$ 28,028		$ 5,652
Total, unrealized losses	$ 274		$ 274		$ 23
Total, number of securities | Security	128		128		35
Mortgage-backed Securities-Residential [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value					$ 856
More than 12 months, fair value					0
Total, fair value					856
Less than 12 months, unrealized losses					20
More than 12 months, unrealized losses					0
Total, unrealized losses					$ 20
Less than 12 months, number of securities | Security					1
More than 12 months, number of securities | Security					0
Total, number of securities | Security					1
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Total, unrealized losses	$ 0		$ 0		$ 0
Mortgage-backed Securities-Multi-family [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	1,232		1,232
More than 12 months, fair value	0		0
Total, fair value	1,232		1,232
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	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]
Less than 12 months, fair value	$ 4,512		$ 4,512		1,250
Less than 12 months, unrealized losses	$ 8		$ 8		$ 6
Less than 12 months, number of securities | Security	4		4		1
More than 12 months, fair value	$ 0		$ 0		$ 3,799
More than 12 months, unrealized losses	$ 0		$ 0		$ 11
More than 12 months, number of securities | Security	0		0		3
Total, fair value	$ 4,512		$ 4,512		$ 5,049
Total, unrealized losses	$ 8		$ 8		$ 17
Total, number of securities | Security	4		4		4
Corporate Debt Securities [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 2,869		$ 2,869
More than 12 months, fair value	0		0
Total, fair value	2,869		2,869
Less than 12 months, unrealized losses	131		131
More than 12 months, unrealized losses	0		0
Total, unrealized losses	$ 131		$ 131
Less than 12 months, number of securities | Security	4		4
More than 12 months, number of securities | Security	0		0
Total, number of securities | Security	4		4
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, fair value	$ 504		$ 504		$ 0
Less than 12 months, unrealized losses	$ 3		$ 3		$ 0
Less than 12 months, number of securities | Security	1		1		0
More than 12 months, fair value	$ 452		$ 452		$ 452
More than 12 months, unrealized losses	$ 33		$ 33		$ 25
More than 12 months, number of securities | Security	1		1		1
Total, fair value	$ 956		$ 956		$ 452
Total, unrealized losses	$ 36		$ 36		$ 25
Total, number of securities | Security	2		2		1