Operating leases, Quantitative Data (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021
Operating Lease Amounts [Abstract]
Right-of-use assets	$ 2,142		$ 2,142		$ 1,887
Lease liabilities	2,195		2,195		$ 1,921
Other Information [Abstract]
Operating outgoing cash flows from operating leases	87	$ 86	174	$ 173
Right-of-use assets obtained in exchange for new operating lease liabilities	415	625	415	625
Lease Costs [Abstract]
Operating lease cost	81	81	161	161
Variable lease cost	$ 10	$ 10	$ 20	$ 20