Operating leases, Quantitative Data (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021
Operating Lease Amounts [Abstract]
Right-of-use assets	$ 1,807		$ 1,887
Lease liabilities	1,844		$ 1,921
Other Information [Abstract]
Operating outgoing cash flows from operating leases	87	$ 88
Right-of-use assets obtained in exchange for new operating lease liabilities	0	625
Lease Costs [Abstract]
Operating lease cost	80	80
Variable lease cost	$ 10	$ 10