Operating leases, Quantitative Data (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating lease amounts [Abstract]
Right-of-use assets	$ 1,887	$ 1,575
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Prepaid expenses and other assets	Prepaid expenses and other assets
Lease liabilities	$ 1,921	$ 1,587
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accrued Liabilities and Other Liabilities	Accrued Liabilities and Other Liabilities
Other information [Abstract]
Operating outgoing cash flows from operating leases	$ 339	$ 296
Right-of-use assets obtained in exchange for new operating lease liabilities	625	1,840
Lease costs [Abstract]
Operating lease cost	321	268
Variable lease cost	$ 40	$ 40