Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended	9 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Jun. 30, 2018		Jun. 30, 2017
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance				$ 83,521	$ 96,191	$ 83,521
Total other comprehensive income (loss), net of taxes		$ 181	$ (326)		398	(648)
Balance		108,265	92,667		$ 108,265	92,667
ASU 2018-02 [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Reclassification for change in accounting	[1]									$ 0
Accumulated Other Comprehensive Loss [Abstract]
Federal corporate tax rate				34.00%	21.00%
ASU 2016-01 [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Reclassification for change in accounting	[2]							$ 0
Accumulated Other Comprehensive Loss [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance		(1,520)	(1,314)	$ (992)	$ (1,623)	(992)
Other comprehensive income (loss) before reclassification		181	(326)		398	(648)
Amounts reclassified from accumulated other comprehensive income		0	0		0	0
Total other comprehensive income (loss), net of taxes		181	(326)		398	(648)
Balance		(1,339)	(1,899)	(1,314)	(1,339)	(1,899)
Accumulated Other Comprehensive Loss [Member] | ASU 2018-02 [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Reclassification of stranded tax effect	[1]		(259)			(259)
Reclassification for change in accounting	[1]									$ (259)
Accumulated Other Comprehensive Loss [Member] | ASU 2016-01 [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Reclassification for change in accounting	[3]						$ 0	(114)	[2]
Unrealized Gain (Losses) on Securities Available-for-sale [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance		113	290	612	10	612
Other comprehensive income (loss) before reclassification		181	(326)		398	(648)
Amounts reclassified from accumulated other comprehensive income		0	0		0	0
Total other comprehensive income (loss), net of taxes		181	(326)		398	(648)
Balance		294	21	290	294	21
Unrealized Gain (Losses) on Securities Available-for-sale [Member] | ASU 2018-02 [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Reclassification of stranded tax effect	[1]		57			57
Unrealized Gain (Losses) on Securities Available-for-sale [Member] | ASU 2016-01 [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Reclassification for change in accounting	[3]						0	(114)
Pension Benefits [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Balance		(1,633)	(1,604)	(1,604)	(1,633)	(1,604)
Other comprehensive income (loss) before reclassification		0	0		0	0
Amounts reclassified from accumulated other comprehensive income		0	0		0	0
Total other comprehensive income (loss), net of taxes		0	0		0	0
Balance		$ (1,633)	(1,920)	$ (1,604)	$ (1,633)	(1,920)
Pension Benefits [Member] | ASU 2018-02 [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Reclassification of stranded tax effect	[1]		$ (316)			$ (316)
Pension Benefits [Member] | ASU 2016-01 [Member]
Balances and changes in components of accumulated other comprehensive loss [Roll Forward]
Reclassification for change in accounting	[3]						$ 0	$ 0

[1] Adoption of Accounting Standard Update 2018-02, reclassification from accumulated other comprehensive loss to retained earnings for stranded tax effects resulting from newly enacted Federal corporate income tax rate from 34% to 21%.

[2] See Note 9 Impact of Recent Accounting Pronouncements - cumulative effect of change in measurement of equity securities.

[3] Adoption of ASU 2016-01 - cumulative effect of change in measurement of equity securities.