Operating leases, Quantitative Data (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2020
Operating Lease Amounts [Abstract]
Right-of-use assets	$ 1,966		$ 1,966		$ 1,575
Lease liabilities	1,994		1,994		$ 1,587
Other Information [Abstract]
Operating outgoing cash flows from operating leases	82	$ 70	225	$ 226
Right-of-use assets obtained in exchange for new operating lease liabilities	0	0	625	1,840
Lease Costs [Abstract]
Operating lease cost	81	63	241	205
Variable lease cost	$ 10	$ 10	$ 30	$ 30