Accumulated Other Comprehensive Loss (Details) $ in Thousands	6 Months Ended
	Dec. 31, 2017 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at June 30, 2017	$ (2,890)
Other comprehensive income before reclassifications	(118)
Amounts reclassified from accumulated other comprehensive income (loss)	41
Net current period other comprehensive income (loss)	(77)
Balance at December 31, 2017	(2,967)
Pension and Postretirement Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at June 30, 2017	(1,345)
Other comprehensive income before reclassifications	(139)
Amounts reclassified from accumulated other comprehensive income (loss)	41
Net current period other comprehensive income (loss)	(98)
Balance at December 31, 2017	(1,443)
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at June 30, 2017	(1,545)
Other comprehensive income before reclassifications	21
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net current period other comprehensive income (loss)	21
Balance at December 31, 2017	$ (1,524)