Consolidated Statements of Stockholders' Equity - 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, July 1, 2017 at Jun. 30, 2017	$ 6,268	$ 762	$ 55,579	$ 79,402	$ (49,985)	$ 92,026
Total comprehensive (loss) income				(3,633)	825	(2,808)
Dividends ($0.20 per share)				(1,401)		(1,401)
Repurchase of shares	(58)	(8)	(497)			(563)
Issuance of stock	20	20	279			319
Stock-based compensation	18		280			298
Conversion	54	(54)
Balance at Jun. 30, 2018	6,302	720	55,641	74,368	(49,160)	87,871
Total comprehensive (loss) income				6,079	(10,081)	(4,002)
Repurchase of shares	(154)	(5)	(791)			(950)
Issuance of stock		15	66			81
Stock-based compensation	19		360			379
Conversion	40	(40)
Transfer of historical translation adjustment				40	(40)
Balance at Jun. 30, 2019	6,207	690	55,276	80,487	(59,281)	83,379
Total						(59,281)
Total comprehensive (loss) income				(21,839)	(16,134)	(37,973)
Repurchase of shares		(6)	(20)			(26)
Issuance of stock		21	52			73
Stock-based compensation	76		454			530
Conversion	25	(25)
Balance at Jun. 30, 2020	$ 6,308	$ 680	$ 55,762	$ 58,648	(75,415)	45,983
Currency translation loss, net of taxes					(61,874)
Pension and postretirement plans, net of taxes					(13,541)
Total					$ (75,415)	$ (75,415)