Pensions and Other Postretirement Benefits - Amounts recognized in consolidated balance sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Pensions and Other Postretirement Benefits
Other accrued expenses	$ (5)	$ (6)
Pension liability - long-term liabilities	(4,005)	(4,136)
Total pension liability	(4,010)	(4,142)
Accumulated other comprehensive loss	$ (1,517)	$ (1,707)