Accumulated Other Comprehensive Income (AOCI) - Reclassification out of AOCI (Details) - Reclassification out of Accumulated Other Comprehensive Income. - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of defined benefit pension items:	$ (11)	$ 6
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Compensation and benefits	Compensation and benefits
Total reclassified amount before tax	$ (11)	$ 96
Available-for-sale Securities, Gross Unrealized Gain
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized gain on securities available-for-sale		90
Provision for income tax
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax benefit	(2)	20
Net Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total reclassification out of AOCI	$ (9)	$ 76