Operating leases, Quantitative Data (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2023
Operating Lease Amounts [Abstract]
Right-of-use assets	$ 2,178		$ 2,178		$ 2,188
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	$ 2,267		$ 2,267		$ 2,277
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	$ 118	$ 90	$ 346	$ 269
Right-of-use assets obtained in exchange for new operating lease liabilities	251	561	251	561
Lease Costs [Abstract]
Operating lease cost	105	87	313	250
Variable lease cost	$ 11	$ 12	$ 33	$ 32