Pensions and Other Postretirement Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Change in benefit obligation:
Benefit obligation at beginning of year	$ 4,610	$ 4,919
Interest cost	73	50
Actuarial loss (gain)	51	(256)
Foreign currency exchange rate change	108	133
Benefits paid	(261)	(236)
Benefit obligation at end of year	4,581	4,610
Change in plan assets:
Fair value of plan assets at beginning of year	1,021	1,192
Actual return on plan assets	(1)	19
Employer contributions	14	14
Benefits paid	(254)	(229)
Foreign currency exchange rate change	29	25
Fair value of plan assets at end of year	809	1,021
Funded status at end of year	$ (3,772)	$ (3,589)