Accumulated Other Comprehensive Income (Loss) (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2017 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at June 30, 2017	$ (2,890)
Other comprehensive income before reclassifications	(52)
Amounts reclassified from accumulated other comprehensive income (loss)	16
Net current period other comprehensive income (loss)	(36)
Balance at September 30, 2017	(2,926)
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	(76)
Amounts reclassified from accumulated other comprehensive income (loss)	16
Net current period other comprehensive income (loss)	(60)
Balance at September 30, 2017	(1,405)
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at June 30, 2017	(1,545)
Other comprehensive income before reclassifications	24
Amounts reclassified from accumulated other comprehensive income (loss)	0
Net current period other comprehensive income (loss)	24
Balance at September 30, 2017	$ (1,521)