Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Jun. 30, 2018	$ 6,302	$ 720	$ 55,641	$ 74,368	$ (49,160)	$ 87,871
Total comprehensive income (loss)				584	(1,571)	(987)
Repurchase of shares		(2)	(11)			(13)
Stock-based compensation	17		90			107
Conversion	10	(10)
Balance at Sep. 30, 2018	6,329	710	55,730	74,992	(50,771)	86,990
Transfer of historical translation adjustment				40	(40)
Issuance of stock		2	10			12
Translation loss, net of taxes					(50,537)
Pension and postretirement plans, net of taxes					(234)
Total					(50,771)
Total						(59,281)
Balance at Jun. 30, 2019	6,207	690	55,276	80,487	(59,281)	83,379
Total comprehensive income (loss)				778	(3,759)	(2,981)
Repurchase of shares		(2)	(8)			(10)
Stock-based compensation	57		157			214
Conversion	6	(6)
Balance at Sep. 30, 2019	6,270	682	55,425	81,265	(63,040)	80,602
Translation loss, net of taxes					(53,297)
Pension and postretirement plans, net of taxes					(9,743)
Total					$ (63,040)	$ (63,040)