Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance at Jun. 30, 2015	$ 12,259	$ 190,807	$ (35,481)	$ (28,057)	$ 639	$ 140,167
Net (loss) income		(13,104)			91	(13,013)
Translation adjustments			(1,582)		25	(1,557)
Benefit plan adjustments, net of tax			(7,080)			(7,080)
Cash dividends		(2,041)			(192)	(2,233)
Compensation expense and windfall tax benefits	946					946
Shares (acquired) issued, net	(1,444)			1,267		(177)
Balance at Jun. 30, 2016	11,761	175,662	(44,143)	(26,790)	563	117,053
Net (loss) income		(6,294)			179	(6,115)
Translation adjustments			972		13	985
Benefit plan adjustments, net of tax			10,500			10,500
Cash dividends					(109)	(109)
Compensation expense and windfall tax benefits	1,393					1,393
Shares (acquired) issued, net	(2,725)			2,585		(140)
Balance at Jun. 30, 2017	10,429	169,368	(32,671)	(24,205)	646	123,567
Net (loss) income		9,528			119	9,647
Translation adjustments			955		26	981
Benefit plan adjustments, net of tax			7,924			7,924
Cash dividends					(172)	(172)
Compensation expense and windfall tax benefits	2,062					2,062
Shares (acquired) issued, net	(921)			528		(393)
Balance at Jun. 30, 2018	$ 11,570	$ 178,896	$ (23,792)	$ (23,677)	$ 619	$ 143,616