Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock Outstanding Class A	Common Stock Outstanding Class B	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance at Jun. 30, 2022	$ 102,429	$ 6,683	$ 610	$ 57,143	$ 89,059	$ (51,066)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	(775)				2,056	(2,831)
Repurchase of shares	(6)		(1)	(5)
Stock-based compensation	185	76		109
Conversion	0	12	(12)
Ending balance at Sep. 30, 2022	101,833	6,771	597	57,247	91,115	(53,897)
Accumulated balance consists of:
Translation loss						(62,881)
Pension and postretirement plans, net of taxes						8,984
Total						(53,897)
Total	(47,935)
Beginning balance at Jun. 30, 2023	129,467	6,854	576	57,825	112,147	(47,935)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	(519)				1,920	(2,439)
Repurchase of shares	(23)		(2)	(21)
Stock-based compensation	65	56		9
Conversion	0	23	(23)
Ending balance at Sep. 30, 2023	128,990	$ 6,933	$ 551	$ 57,813	$ 114,067	(50,374)
Accumulated balance consists of:
Translation loss						(58,245)
Pension and postretirement plans, net of taxes						7,871
Total	$ (50,374)					$ (50,374)