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, 2021	$ 83,535	$ 6,475	$ 634	$ 56,507	$ 74,181	$ (54,262)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Total comprehensive income (loss)	(445)				3,232	(3,677)
Repurchase of shares	(16)		(2)	(14)
Stock-based compensation	174	119		55
Conversion		25	(25)
Ending balance at Sep. 30, 2021	83,248	6,619	607	56,548	77,413	(57,939)
Accumulated balance consists of:
Translation loss						(59,657)
Pension and postretirement plans, net of taxes						1,718
Accumulated other comprehensive loss						(57,939)
Accumulated other comprehensive loss	(51,066)
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
Accumulated other comprehensive loss	$ (53,897)					$ (53,897)