Operating leases, Quantitative Data (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Jun. 30, 2022
Operating Lease Amounts [Abstract]
Right-of-use assets	$ 2,291		$ 2,291		$ 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	$ 2,364		$ 2,364		$ 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	$ 89	$ 269	$ 263
Right-of-use assets obtained in exchange for new operating lease liabilities	561	0	561	415
Lease Costs [Abstract]
Operating lease cost	87	81	250	242
Variable lease cost	$ 12	$ 12	$ 32	$ 32