Operating leases, Quantitative Data (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2022
Operating Lease Amounts [Abstract]
Right-of-use assets	$ 1,817		$ 1,817		$ 1,980
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid Expense and Other Assets		Prepaid Expense and Other Assets		Prepaid Expense and Other Assets
Lease liabilities	$ 1,881		$ 1,881		$ 2,040
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accrued Liabilities and Other Liabilities		Accrued Liabilities and Other Liabilities		Accrued Liabilities and Other Liabilities
Other Information [Abstract]
Operating outgoing cash flows from operating leases	$ 90	$ 87	$ 179	$ 174
Right-of-use assets obtained in exchange for new operating lease liabilities	0	415	0	415
Lease Costs [Abstract]
Operating lease cost	82	81	163	161
Variable lease cost	$ 10	$ 10	$ 20	$ 20